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Home , Equine anatomy, Equine nutrition

24th Symposium of the Equine Science Society

May 26–29, 2015 TradeWinds Island Resort St. Pete Beach, Florida

PROGRAM

Hosted by the University of Florida

Table of Contents

Officers and Board Members...... 2 Standing Committees ...... 2 Presentation Information ...... 3 Event Schedule...... 4 Maps...... 7 Scientific Sessions...... 9 Tuesday, May 26 ...... 9 Wednesday, May 27...... 9 Oral Presentations and Plenary Sessions ...... 9 Workshop...... 16 Other Activities ...... 16 Thursday, May 28...... 17 Poster Presentations ...... 17 Workshops...... 19 Other Activities ...... 19 Friday, May 29...... 20 Oral Presentations and Plenary Sessions ...... 20 Poster Presentations ...... 24 Other Activities ...... 26 Awards ...... 27 Sponsors ...... 28

1 2013–2015 Equine Science Society

Officers and Board Members

Jason E. Bruemmer, President Karin D. Bump, Director (2017) Lori K. Warren, Vice President Patricia Harris, Director (2017) Kenneth H. McKeever, Secretary–Treasurer Shannon Pratt-Phillips, Director (2019) Brian D. Nielsen, Past President Karyn Malinowski, Director (2019) W. Burton Staniar, Director (2015) Brittany Harlow, Graduate Student Director (2015) Jason L. Turner, Director (2015) Robert J. Coleman, Executive Secretary

Standing Committees

Program Chair Finance and Fundraising Lori K. Warren Amy Burk (Chair) Bob Coleman (Chair) Shannon Pratt-Phillips Lori K. Warren Host Committee Josie Coverdale Stephen Duren Lori K. Warren (Chair) Holly Spooner Bill Day Samantha Brooks Patty Graham-Thiers Judy Downer Student Competition Christopher Mortensen Teresa Douthit (Chair) Saundra TenBroeck Rebecca Splan (Chair) Karen Wimbush Kelly Vineyard Samantha Brooks C. A. Shea Porr Carissa Wickens Rebecca Bellone Jessica Petersen Society Awards Exercise Physiology William Schurg (Chair) Reproductive Physiology Tanja Hess (Chair) Don Thompson Kris Hiney Heidi Brady (Chair) Betsy Wagner Carey Williams Rebecca Bott Clay Cavinder Membership Production and Management Gary Webb Amy Burk (Chair) Janice Holland (Chair) Steve Cooper Teaching and Extension Krishona Martinson Kari Turner Kristine Vernon Mike Yoder (Chair) Bridgett McIntosh Karen Waite Nominating Committee Peggy Miller David Denniston Ed Squires (Chair) Rebecca Splan Dean Jousan Laurie Lawrence Marcia Hathaway Ann Swinker Carissa Wickens Mary Beth Gordon

2 Presentation Information Information General

Oral Presentations The scheduled time for oral presentation of each abstract is 12 minutes, followed by 3 minutes for questions, discussion, and speaker transition.

Presentations should be prepared in Microsoft PowerPoint (version 2007 or later) and be PC compatible. Presentations should be saved on a USB jump drive for on-site uploading to a conference computer.

Each session room will be equipped with a laptop computer (PC), LCD projector, and podium. Most rooms will also have fixed microphones. With the exception of invited speakers, the use of personal computers is not permitted in session rooms.

On-Site Upload Presentation files must be uploaded to a conference computer at least one day prior to the scheduled presentation. Please note that presentations will not be accepted, nor can they be modified, in the session rooms. Additionally, no presentations will be loaded while the session is in progress, between presentations, or during breaks.

Presentation Upload Details: Tuesday, May 26...... 2:00 pm–7:00 pm ...... Jacaranda Hall Foyer Wednesday, May 27...... 8:00 am–5:00 pm...... Convention Office (Grand Palm Colonnade) Thursday, May 28...... 8:00 am–12:00 pm ...... Convention Office (Grand Palm Colonnade)

Poster Presentations Posters will be displayed in the Banyan Breezeway. Each poster will have an assigned board; please look for the poster num- ber (same as the abstract number) as noted in this program to locate your board. Push pins for attaching posters to boards will be provided.

Posters should be displayed by 10:00 am on Wednesday, May 27, and remain on display for the entire meeting. Posters should be removed by 6:00 pm on Friday, May 29 (any left behind will be discarded).

At the 2015 symposium, there will be two poster sessions divided by section:

Poster Session 1: Thursday, May 28, 9:00–10:30 am—Genetics, Exercise Physiology, Nutrition, Reproduction

Poster Session 2: Friday, May 29, 3:30–5:00 pm—Production and Management, Teaching and Extension

Refer to the program listing to confirm which session your poster was assigned to. An author must be present at the poster during the assigned session. Posters will also be viewable during all refreshment breaks; although not required, authors may wish to check in periodically at their poster during breaks.

3 Event Schedule Tuesday, May 26 2:00–4:00 pm ESS Board of Directors meeting...... Spotted Curlew 2:00–8:00 pm Conference registration...... Convention Office (Grand Palm Colonnade) 2:00–7:00 pm Put up posters (must be up by Wednesday at 10:00 am) . . . Banyan Breezeway 2:00–7:00 pm Presentation upload (Wednesday or Friday presentations). . Jacaranda Hall Foyer 2:00–7:00 pm Presenter practice room...... Glades (Jacaranda Hall)

5:00–7:00 pm Opening reception...... Breck Deck North (outdoors)

7:00 pm Welcome...... Tarpon/Sawyer/Long Key (Island Ballroom) 7:15–8:30 pm Squire’s Lecture—Equine Reproduction Donald L. Thompson Jr.—Prolactin in the : Historical perspective, actions and reactions, and its role in reproduction...... Tarpon/Sawyer/Long Key (Island Ballroom)

Wednesday, May 27 6:00–7:00 am “Society Stakes” 25-Furlong Fun Run/Walk...... Cabana Hut (on the beach) 7:00 am–7:00 pm Conference registration...... Convention Office (Grand Palm Colonnade) 8:00 am–5:00 pm Presentation upload (Friday presentations only)...... Convention Office (Grand Palm Colonnade)

8:00–9:00 am Invited Speaker—Exercise Physiology David Marlin—Has the golden age of equine exercise physiology passed, and if so, have we answered all the big questions? ...... Tarpon/Sawyer/Long Key (Island Ballroom)

9:15–10:30 am Exercise physiology: Graduate student competition . . . . . Glades (Jacaranda Hall) 9:15–10:30 am Nutrition: Graduate student competition (1)...... Sabal (Jacaranda Hall) 9:15–10:30 am Production and management: Graduate student competition (1)...... Jasmine (Jacaranda Hall) 9:15–10:30 am Undergraduate student competition (1)...... Citrus (Jacaranda Hall)

10:30–11:00 am Refreshment break...... Banyan Breezeway

11:00 am–12:00 pm Genetics: Graduate student competition...... Glades (Jacaranda Hall) 11:00 am–12:00 pm Nutrition: Graduate student competition (2)...... Sabal (Jacaranda Hall) 11:00 am–12:00 pm Production and management: Graduate student competition (2)...... Jasmine (Jacaranda Hall) 11:00 am–12:00 pm Undergraduate student competition (3)...... Citrus (Jacaranda Hall)

12:00–1:30 pm Invited Speaker Luncheon—Nutrition Eduardo Valdes—Feeding wild animals, including the horse's exotic relatives...... Tarpon/Sawyer/Long Key (Island Ballroom) 1:45–3:30 pm Reproductive physiology: Graduate student competition (1)...... Glades (Jacaranda Hall) 1:45–3:30 pm Nutrition: Graduate student competition (3)...... Sabal (Jacaranda Hall)

4 Event

Schedule 5 Sabal (Jacaranda Hall) Jasmine (Jacaranda Hall) Jasmine (Jacaranda Hall) (JacarandaCitrus Hall) Breezeway Banyan Glades (Jacaranda Hall) Sabal (Jacaranda Hall) Jasmine (Jacaranda Hall) (JacarandaCitrus Hall) Key Tarpon/Sawyer/Long Ballroom) (Island Garden Courtyard (outdoors) Blue Heron Office Convention Colonnade) Palm (Grand Glades (Jacaranda Hall) Key Tarpon/Sawyer/Long Ballroom) (Island Breezeway Banyan Breezeway Banyan Sabal (Jacaranda Hall) Jasmine (Jacaranda Hall)

......

......

...... curriculum enhancing equine behaviorto and welfare and tenure promotion, reappointment, for Tips ...... (3) competition student Graduate . . . (4)...... competition student Graduate enhance to innovation Using of things: internet The and extensionteaching horse-industry(with Florida guests)...... Ernie Bailey—Genetics TWILIGHTAfter ...... physiology Exercise Genetics Nutrition Reproductive physiology assessment and program Undergraduate a collaborative accreditation—Building modelpeer-based ...... we Determining equine digestibility coefficients—Can protocol? research a standardized for define criteria and learning theory—A approach science strategic ...... (2)...... competition student Graduate Workshop ARPAS exam ARPAS . . . . . (3)...... competition student Undergraduate ...... break Refreshment Reproductive physiology: competition student Graduate and extension: Teaching and management: Production . (4)...... competition student Undergraduate Workshop Dinner Growl Gator . . upload...... Presentation practice room Presenter Speaker—Genetics Invited ...... break Refreshment Session 1 Poster Workshop Workshop own on your Lunch Workshop Production and management: and Production 2:00–3:30 pm 6:30–8:00 am Thursday, May 28 May Thursday, pm 1:45–3:30 pm 3:30–4:00 4:00–5:00 pm 4:00–5:00 pm 4:00–5:00 pm 4:00–5:00 pm 5:15–6:45 pm 7:00–9:00 pm 8:00 am–12:00 pm 8:00 am–5:00 pm 8:00–9:00 pm 9:00–9:30 pm 9:00–10:30 pm 11:00 am–12:30 pm 11:00 am–12:30 pm 12:30–2:00 pm 2:00–3:30 pm 1:45–3:30 pm 1:45–3:30 7:00–9:00 pm Student mixer...... Breck Beach (outdoors) Maps TradeWinds Resort Friday, May 29 8:00–9:00 am Invited Speaker—Teaching and Extension Alex Thiemann—Donkeys are different...... Tarpon/Sawyer/Long Key (Island Ballroom)

9:15–10:30 am Nutrition: General session (1) ...... Sabal (Jacaranda Hall) 9:15–10:30 am Reproductive physiology: General session...... Jasmine (Jacaranda Hall) 9:15–10:30 am Teaching and extension: General session (1)...... Glades (Jacaranda Hall)

10:30–11:00 am Refreshment break...... Banyan Breezeway

11:00 am–12:30 pm Nutrition: General session (2) ...... Sabal (Jacaranda Hall) 11:00 am–12:30 pm Production and management: General session (1)...... Jasmine (Jacaranda Hall) 11:00 am–12:30 pm Teaching and extension: General session (2)...... Glades (Jacaranda Hall)

12:30–2:00 pm Invited Speaker Luncheon—Production and Management Molly McCue—Equine Metabolic Syndrome: A complex disease influenced by genetics and the environment...... Tarpon/Sawyer/Long Key (Island Ballroom)

2:15–3:30 pm Exercise physiology: General session...... Sabal (Jacaranda Hall) 2:15–3:30 pm Production and management: General session (2)...... Jasmine (Jacaranda Hall) 2:15–3:30 pm Teaching and extension: General session (3)...... Glades (Jacaranda Hall)

3:30–4:00 pm Refreshment break...... Banyan Breezeway

3:30–5:00 pm Poster Session 2 Production and management Teaching and extension ...... Banyan Breezeway

5:00–6:00 pm ESS General Business Meeting...... Tarpon Key (Island Ballroom)

6:30–9:00 pm ESS Awards Banquet cocktails (6:30 pm); dinner (7:00 pm)...... Garden Courtyard (outdoors)

6 Maps 7 Maps TradeWinds Resort TradeWinds Maps Meeting Rooms

8 Wednesday

Orals 9

College

y Sessions Rutgers University Rutgers Colorado State University Colorado State  6:00–7:00 am 5:00–7:00 pm Glades (Jacaranda Hall) Glades (Jacaranda Opening Reception Tuesday, May 26 May Tuesday, Breck Deck North (outdoors) Breck Wednesday, May 27 May Wednesday, Scientific Sessions Scientific Meet at Cabana Hut on the beach at Meet Sponsored by Tribute Equine Tribute by Sponsored Sponsored by Probiotech International Inc. International Probiotech by Sponsored Island Ballroom (Tarpon/Sawyer/Long Key) (Tarpon/Sawyer/Long Island Ballroom Island Ballroom (Tarpon/Sawyer/Long Key) (Tarpon/Sawyer/Long Island Ballroom Sponsored by Zinpro Performance Performance Zinpro by Sponsored Sponsored by Zinpro Performance Minerals Performance Zinpro by Sponsored Texas Tech University Tech Texas Heidi Brady, Moderator: Moderator: Carey Williams, Carey Moderator: Invited Speaker—Exercise Physiology Speaker—Exercise Invited David Marlin Consulting Ltd., Bury St. Edmunds, Suffolk, United Kingdom United Suffolk, Edmunds, Bury St. Ltd., David Marlin Consulting Moderator: Tanja Hess, Tanja Moderator: Chair, Department of Animal Sciences, University of Florida of Animal Sciences, Department Chair, “Society Stakes” 25-Furlong Fun Run/Walk Fun 25-Furlong “Society Stakes” Squire’s Lecture—Reproductive Physiology Lecture—Reproductive Squire’s Exercise Physiology: Graduate Student Competition Competition Student Graduate Physiology: Exercise Plenar and Oral Presentations David Marlin, David TX, USA Station, activity horseback during high-intensity expenditure Rider energy A&M University, Texas E. Sawyer, J. M. M. Vogelsang, Fluckey, D. J. H. Sigler, D. C. L. O’Reilly*, Has the golden age of equine exercise physiology passed, and if so, have we answered all the big questions? questions? big the all answered we have so, if and passed, physiology exercise equine of age golden the Has Welcome Geoff Dahl, Commissioner of Agriculture, Florida Department of Agriculture and Consumer Services Adam Putnum, Commissioner of Agriculture, Florida Department President ESS Jason Bruemmer, reproduction in role reactions, and its and actions perspective, Historical in the horse: Prolactin LA, USA Rouge, Baton University Agricultural Center, Louisiana State Jr., Donald L. Thompson 21 9:15 am 8:00–9:00 am 7:00 pm 7:15–8:15 pm Maps Meeting Rooms 9:30 am 22 The effects of conjugated linoleic acid supplementation on lipopolysaccharide-stimulated fibroblastic synoviocytes: A preliminary study A. A. Millican*1, K. L. Vernon1, H. Walker-Dunn1, J. A. Coverdale2, W. C. Bridges1, 1Clemson University, Clemson, SC, USA, 2Texas A&M University, College Station, TX, USA 9:45 am 23 Influence of whole-body vibration on bone density in the stalled horse E. S. Hulak*, H. S. Spooner, J. C. Haffner, Middle Tennessee State University, Murfreesboro, TN, USA 10:00 am 24 The effect of chiropractic treatment on performance and behavior of lesson J. A. Schultz*1, J. C. Haffner1, M. S. Wooten2, R. M. Hoffman1, H. S. Spooner1, 1Middle Tennessee State University, Murfreesboro, TN, USA, 2Equine Performax Veterinary, Thompson’s Station, TN, USA 10:15 am 25 The thermal effects of protective sports boots on the forelimb of and Argentinian polo B. C. Snively*, J. E. Bowser, B. Nabors, R. L. Linford, Mississippi State University, Starkville, MS, USA 10:30 am Refreshment Break (Banyan Breezeway)

Nutrition: Graduate Student Competition (1) Moderator: Amy Burk, University of Maryland Sabal (Jacaranda Hall)

9:15 am 38 Exogenous lactobacilli mitigate microbial changes associated with in vitro B. E. Harlow*1, L. M. Lawrence1, I. A. Kagan1,2, P. A. Harris3, M. D. Flythe1,2, 1University of Kentucky, Lexington, KY, USA, 2USDA, Agricultural Research Service, -Animal Production Research Unit, Lexington, KY, USA, 3Waltham Centre for Pet Nutrition, Melton Mowbray, Leicestershire, UK 9:30 am 39 Foregut survivability of Megasphaera elsdenii in equine T. K. Dove*, C. A. Aperce, W. L. Beard, J. M. Kouba, C. I. Vahl, J. S. Drouillard, T. L. Douthit, Kansas State University, Manhattan, KS, USA 9:45 am 40 Colonic bacterial composition and cells in horses undergoing a change of diet P. Grimm*, C. Philippeau, V. Julliand, Agrosup Dijon, Dijon, Bourgogne, France 10:00 am 41 aspartate supplementation and reaction speed response in horses J. A. Dodd*1, G. Doran1, P. Harris2, G. K. Noble1, 1Charles Sturt University, Wagga Wagga, NSW, Australia, 2Waltham Centre for Pet Nutrition, Leicestershire, United Kingdom 10:15 am 42 Comparison of inflammation, nutritional status, muscle mass, pituitary function, and age in geriatric horses M. H. Siard*1, A. Betancourt1, P. A. Harris2, A. D. Moffett3, K. E. McMurry1, S. E. Reedy1, A. A. Adams1, 1University of Kentucky, Lexington, KY, USA, 2WALTHAM Centre for Pet Nutrition, Waltham on the Wolds, Leicestershire, United Kingdom, 3MARS Horsecare US Inc., Dalton, OH, USA 10:30 am Refreshment Break (Banyan Breezeway)

Production and Management: Graduate Student Competition (1) Moderator: Janice Holland, Midway College Jasmine (Jacaranda Hall)

9:15 am 80 Dopaminergic (cabergoline) and antidopaminergic (sulpiride) effects on indices of insulin sensitivity in horses N. A. Valencia*, D. L. Thompson, E. L. Oberhaus, Louisiana State University Agricultural Center, Baton Rouge, LA, USA 9:30 am 81 The effects of a prostaglandin transport inhibitor (DIDS) on delaying diestrus in non-pregnant K. M. Klohonatz*, L. C. Nulton, G. J. Bouma, J. E. Bruemmer, Colorado State University, Fort Collins, CO, USA 9:45 am 82 Effects of prolonged dexamethasone treatment on signaling pathways associated with muscle degradation in mature horses C. M. M. Loos*1, T. Barnes1, K. M. Brennan2, K. L. Urschel1, 1University of Kentucky, Lexington, KY, USA, 2Alltech Inc., Nicholasville, KY, USA 10:00 am 83 Maternal supplementation influences memory and learning ability in and 2-year-old horses A. M. Adkin*, A. V. Muniz, C. J. Mortensen, L. K. Warren, University of Florida, Gainesville, FL, USA 10:15 am 84 Yield, forage nutritive value, and preference of annual grasses under horse A. M. Grev*, C. C. Sheaffer, D. N. Catalano, M. L. Schultz, K. L. Martinson, University of Minnesota, St. Paul, MN, USA 10:30 am Refreshment Break (Banyan Breezeway)

10 Wednesday Orals 11 , 1 , G. 5 , M. K. 1 Fort Collins,Fort Clemson Fort Collins, Fort 2 University of , N. Mujahid 2 1 Helsinki, Finland, Helsinki, Middleburg, VA, VA, Middleburg, , T. Árnason , T. 4 Middleburg, VA, USA VA, Middleburg, Gainesville, FL,, Gainesville, USA University of California– 1 , A. Claude , 1 1 , R. A. Dabareiner 1 Knubbo, Morgongåva, Sweden Morgongåva, Knubbo, Nantwich, England Nantwich, Gainesville, FL,, Gainesville, USA , L. Andersson , USA NY, , Ithaca, 1 , A. Eddy 1 , , University Colorado State , TX, USA College Station, 1

, , of Helsinki University , , University Colorado State , IHBC AB, 2 , , 1 , R. Bellone 5 1 2 , , 1 University of Florida

, C. E. Arnold 3 , A. Perkins Columbus, OH, USA 1 , L. S. Andersson 3 Mississippi State, MS, , Mississippi State, University Mississippi State Cornell University , R. Seferian , T. M. Hess T. , 1 1 2 2 , , 1 3 , J. E. Bruemmer J. , 1 , Sweden Uppsala, , , Sweden Uppsala, Gainesville, FL,, Gainesville, USA , , Harper Adams University 4 , S. Kumar 1 Texas A&M University, Texas 1 , R., Splan , J. L. Leatherwood , J. 4 , 2 1 , M. Huynh 2 , M. Mäenpää 2 University of California–Davis University of Maryland , T. M. Hess T. , , S. A. Brooks 2 2 , C. E. Swiderski 2 , M. A. Arrick 1 , C. Woolley , 2 The Ohio State University, The Ohio State , , University Uppsala , S. B. Smith 4 , K. L. Vernon 1 1 University of Florida 3 , R., K. Splan Huntsville, TX, USA University, Huntsville, State Sam Houston , , Scotland Edinburgh, 1 3 Sabal (Jacaranda Hall) Sabal (Jacaranda Citrus (Jacaranda Hall) Citrus (Jacaranda , A. Mykkänen Glades (Jacaranda Hall) Glades (Jacaranda 1 , J. D. Albright D. , J. 1 , S. C. Burgess , R., Jacobs 1 3 Tampa, FL, USA , Tampa, University of Tampa , C. L. Hunter 2 1 , T. Mask T. , , S. Romero de Mello Sa , S. Romero 1 , T. H. Welsh , T. 1 2 , Finland, Espoo, , J. A. Coverdale , J. 1 Moderator: Amy Burk, Amy Moderator: , L. Johansson 1 , J. Rayner J. , , E. A. Staiger 1 1 , B. Nanduri Undergraduate Student Competition (1) Competition Student Undergraduate Genetics: Graduate Student Competition Student Graduate Genetics: 1 , USA Clemson, SC, , , of Agricultural Sciences University Swedish 1 , TN, USA , Knoxville, , , Virginia Tech Center, and Extension Agricultural Research Middleburg Virginia Tech , L. A. Bright , , Virginia Tech Center, and Extension Middleburg Agricultural Research Virginia Tech 2 , , Nutrition: Graduate Student Competition (2) Competition Student Graduate Nutrition: 1 2 1 , M. Lassaline Moderator: Rebecca Bellone, Rebecca Moderator: 1 Tucson, AZ, USA , Tucson, University of Arizona University of Nebraska–Lincoln University Petersen, Jessica Moderator: , , University of Edinburgh , A. A. Millican , Davis, CA,, USA 2 3 1 , , , Suomen Hippos rySuomen , (Banyan Breezeway) (Banyan Break Refreshment USA Tennessee University, M. Brashier in horses requirements study threonine to technique oxidation Using the indicator USA KY, , Lexington, University of Kentucky K. L. Urschel, Brewster-Barnes, C. H. Mok*, T. Kahn “A sorrel is hot…” A genetic investigation of the horseman’s myth horseman’s of the investigation A genetic is hot…” sorrel “A L. N. Jacobs* , , USA CO, The “ heaves” restricted lung transcriptome: A tool to decipher the pathophysiology of airway of airway decipher the pathophysiology to A tool transcriptome: lung restricted heaves” The “pasture in the horse diseases hyper-responsive S. Mack* Differential circulating microRNA profile in insulin-sensitive vs. insulin-resistant mares vs. insulin-resistant profile in insulin-sensitive microRNA circulating Differential Santos* da Costa H. F. 3 stress to response in subsets function and lymphocyte on neutrophil β-glucan of Influence Warren, T. Long, L. K. R. M. Bobel*, M. R. Abbott, M. Di-Lernia, J. J. Davis mares Horse Quarter mature response in on immune vaccination day of of time of Influence Reddish, K. Cole*, J. M. Seeloff, D. syndrome with metabolic of mares and a group on pasture Seasonal effects S. Lapinskas* Preliminary investigation of phenotyping methods for response to a sudden novel stimulus in the horse stimulus in the novel sudden to a response for methods of phenotyping investigation Preliminary University of Florida Callaham, S. A. Brooks, J. Dinerman*, C. L. Wickens, A. J. traits in and riding racing performance harness affects keeper” mutation “Gait The DMRT3 K. Jäderkvist* USA , USA CO, Lindgren Genetic investigation of limbal squamous cell carcinoma in horses Haflinger carcinoma in cell of limbal squamous investigation Genetic Liu* J. Evaluation of conjugated linoleic acid supplementation on markers of joint inflammation and cartilage cartilage and inflammation of joint on markers linoleic acid supplementation conjugated of Evaluation (LPS) with lipopolysaccharide challenged horses in young metabolism A. N. Bradbery* 45 2 1 43 34 120 5 35 36 3 44 10:30 am 11:30 am 9:30 am 9:15 am 11:00 am 11:00 am 10:00 am 10:15 am 11:15 am 11:30 am 9:45 am 11:15 am 11:45 am 46 Postprandial changes in plasma urea nitrogen concentrations in response to amino acid supplementation in horses C. M. Latham*1, T. Brewster-Barnes1, K. L. Urschel1, A. L. Wagner2, 1University of Kentucky, Lexington, KY, USA, 2Cooperative Research Farms, Richmond, VA, USA 12:00 pm Invited Speaker Luncheon (Island Ballroom—Tarpon/Sawyer/Long Key)

Production and Management: Graduate Student Competition (2) Moderator: Marcia Hathaway, University of Minnesota Jasmine (Jacaranda Hall)

11:00 am 85 Effects of rotational versus continuous grazing on horse condition and plant performance L. B. Kenny*1, A. O. Burk2, C. A. Williams1, 1Rutgers, the State University of New Jersey, New Brunswick, NJ, USA, 2University of Maryland, College Park, MD, USA 11:15 am 86 Forage nutritive value, yield, and preference of warm season grasses grazed by horses in the upper Midwest M. L. Schultz*, C. C. Sheaffer, D. N. Catalano, A. M. Grev, K. L. Martinson, University of Minnesota, St. Paul, MN, USA 11:30 am 87 Influence of forage type on rate of intake, mastication and production E. Lee*, T. Fraguela, L. K. Warren, University of Florida, Gainesville, FL, USA 11:45 am 88 Supplement use and perceptions: A survey of US horse owners N. K. Swirsley*, H. S. Spooner, R. M. Hoffman, Middle Tennessee State University, Murfreesboro, TN, USA 12:00 pm Invited Speaker Luncheon (Island Ballroom—Tarpon/Sawyer/Long Key)

Undergraduate Student Competition (2) Moderator: Kristine Vernon, Clemson University Citrus (Jacaranda Hall)

11:00 am 6 The effect of supplementation on behavior and glycemic response in horses K. E. Martin*, R. M. Hoffman, H. S. Spooner, Middle Tennessee State University, Murfreesboro, TN, USA 11:15 am 7 Effects of rotational grazing on -soluble and energy content of horse A. D. Daniel*1, B. J. McIntosh2, J. D. Plunk1, M. Webb1, D. McIntosh1, A. G. Parks1, 1University of Tennessee, Knoxville, TN, USA, 2Virginia Tech, Blacksburg, VA, USA 11:30 am 8 The effects of rotational grazing on forage biomass yield and botanical composition of horse pastures A. M. Virostek*2, B. McIntosh1,2, A. Daniel1, M. Webb1, J. D. Plunk1, 1University of Tennessee, Knoxville, TN, USA, 2Virginia Polytechnic Institute and State University, Blacksburg, VA, USA 11:45 am 9 An investigation into miRNAs in the equine epididymis as a potential regulators of spermatozoal maturation A. D. Belk*, K. M. Klohonatz, G. J. Bouma, J. E. Bruemmer, Colorado State University, Fort Collins, CO, USA 12:00 pm Invited Speaker Luncheon (Island Ballroom—Tarpon/Sawyer/Long Key)

Invited Speaker Luncheon—Nutrition Sponsored by McCauley Brothers Inc. Moderator: Shannon Pratt-Phillips, North Carolina State University Island Ballroom (Tarpon/Sawyer/Long Key)

12:00 pm Buffet lunch service begins 12:30–1:30 pm Feeding wild animals, including the horse’s exotic relatives Eduardo Valdes, Disney’s Animal Kingdom, Animal Nutrition Center, Lake Buena Vista, FL, USA

12 Wednesday Orals 13 , 1

Michigan 2 University 2 , University of , K. L. 1 Emory, VA, USA VA, Emory, , , , K. B. Pritchett 2

Disney’s Animal Disney’s Springfield, MO, Springfield, MO, 1 , 1 , University Murray State 1 Gainesville, FL, , Gainesville, USA , , Oklahoma State University, Oklahoma State 1 4 , University of Kentucky , A. M. Hansen 1 , N. L. Walker 1 , L. K. Warren 1,2 Emory and HenryEmory College 3 , F. X. Yildiz , F.

1 , C. A., Shea Porr 3 , A. K. Rendahl

Wagga Wagga, NSW, Australia NSW, Wagga, , Wagga 1 Missouri State University, Missouri State 1 Athens, GA,, USA , Athens, , 2 , E. V. Valdes , E. V. 1 Gainesville, FL,, Gainesville, USA Lexington, KY, USA KY, , Lexington, University of Kentucky 2 , IN, USA Lafayette, Purdue University, West Virginia Tech 1 , Baton Rouge, LA, USA Rouge, University, Baton Louisiana State 1 2 , S. Sacra 1 , M. M. Beverly 1 , M. E. McCue Rutgers University Rutgers 1 , , USA VA, Richmond, , M. Knutson 1 , P. M. Graham-Thiers P. , , C. Brady 2 4 University of Georgia Charles Sturt University 3 1 , , E. L. Walker University of Florida 2 2 2 , M. J. Anderson , M. J. 1 , K. Hiney , M. R. Hathaway 3 2 Sabal (Jacaranda Hall) Sabal (Jacaranda , S. E. Livingston , A., L. Wagner Jasmine (Jacaranda Hall) Jasmine (Jacaranda 1 1,2 , H. L. Brady , P. K. Knight , P. 1 1 , A. Borron 2 , Farms, Research Cooperative 2 , R. J. Coleman , R. J. Moderator: Bridgett McIntosh, McIntosh, Bridgett Moderator: , S. R. Lavin 1 , A., M. Shultz Moderator: Carey Williams, Williams, Carey Moderator: 1 1,2 , J. L. Leatherwood , J. 1 , USA MN, , St. Paul, University of Minnesota 1 , G. K. Noble , G. W. Webb , G. W. 1 , 1 1 , K. Waite 1 Nutrition: Graduate Student Competition (3) Competition Student Graduate Nutrition: Lake Buena Vista, FL,, USA Buena Vista, , Lake Texas Tech University, Lubbock, TX, USA Tech Texas 2 , , TX, USA University, Huntsville, State Sam Houston USA , Lansing, MI, USA University, East State welfare horse effects on practices competition and training, of management, perception Exhibitors’ M. Voigt* competitions ranch horse riding or used in trail horses for methods of anthelmintic A survey C. O’Hara* Estimation of actual and ideal bodyweight for adult draft and horse breeds using horse warmblood and draft for adult of actual and ideal bodyweight Estimation measurements morphometric N. Catalano* D. Effects of transitioning from a fescue diet to a spring fescue pasture diet on plasma fructosamine, on plasma fructosamine, diet fescue pasture to a spring hay diet fescue from a of transitioning Effects mares horse stock of scores body condition and body weights, USA Green, KY, University, Bowling Kentucky Western L. Brown, E. Grey, C. E. Anderson, A. Montgomery*, P. geldings Horse of Quarter concentrations on plasma C-peptide propionate chromium of dietary Effect University, North Carolina State S. E. Pratt-Phillips, M. Siciliano, P. Spears, W. J. K. E. Lloyd, Goertzen*, E. W. USA Raleigh, NC, to a meal or oral responses and insulinemic glycemic postprandial on β-glucan of oat Influence University of Florida L. K. Warren, M. Bobel, L. A. J. Skurupey, Robbins, V. Weir*, J. black rhinoceros horse and between the and fiber protein, matter, of dry digestibility Comparative K. E. Sullivan* 1 cushion in horses the digital examining study A preliminary USA ND, University, Fargo, State North Dakota Hammer, C. J. M. A. Gunkelman*, in horses status of health as indicators temperatures rectal of ocular and Relationship H. C. Collins* Stillwater, OK, USA Stillwater, (EGUS) syndrome ulcer gastric on equine of GastroTech Effects A. L. Conover* Sydney, NSW, Australia NSW, , Sydney, of Sydney Breezeway) (Banyan Break Refreshment Kingdom Estimation of forces generated by a jockey using the padded whip in a routine jump out using the padded whip in a by a jockey generated forces of Estimation J. A. Dodd* J. Martinson estimates in digestibility variation for Accounting Crum, L. M. Lawrence, A. D. M. B. Pyles, S. H. Hayes, B. E. Harlow, A. L. Fowler*, USA KY, Lexington, over a 42-d period horses of thirty-five intakes energy Digestible University, North Carolina State S. E. Pratt-Phillips, D. Siciliano, P. M. A. Hastings, K. E. Lloyd, C. Gill*, J. USA Raleigh, NC, horses in parameters retention digesta to models multi-compartmental of mathematical Application L. M. Lawrence, A. Crum, S. H. Hayes, Stilwell, Bill, V. V. B. E. Harlow, L. Hansen*, A. L. Fowler, T. Lexington, KY, USA KY, , Lexington, Kentucky Breezeway) (Banyan Break Refreshment , , USA KY, Murray, Production and Management: Graduate Student Competition (3) Competition Student Graduate Production and Management: 90 89 94 48 49 50 47 92 93 91 95 51 52 53 2:00 pm 1:45 pm 3:00 pm 2:00 pm 2:15 pm 2:30 pm 1:45 pm 2:30 pm 2:45 pm 2:15 pm 3:30 pm 3:15 pm 2:45 pm 3:00 pm 3:15 pm 3:30 pm Reproductive Physiology: Graduate Student Competition (1) Moderator: Rebecca Bott, South Dakota State University Glades (Jacaranda Hall)

1:45 pm 126 The presence of focal adhesion molecules in equine endometrium during maternal recognition of K. M. Klohonatz*, G. J. Bouma, J. E. Bruemmer, Colorado State University, Fort Collins, CO, USA 2:00 pm 127 Use of intravaginal triptorelin gel for ovulation induction in mares C. D. Sinclair*1, J. M. Kouba1, L. W. Murray1, T. L. Douthit1, D. M. Grieger1, S. K. Webel2, 1Kansas State University, Manhattan, KS, USA, 2JBS United, Sheridan, IN, USA 2:15 pm 128 Comparison of prolactin responses to repetitive cabergoline treatments in two consecutive years in mares E. L. Oberhaus*1, D. L. Thompson1, N. A. Valencia1, R. M. Gilley2, 1Louisiana State University Agricultural Center, Baton Rouge, LA, USA, 2BioRelease Technologies LLC, Birmingham, AL, USA 2:30 pm 129 Effects of feeding a yeast-based supplement containing selenized yeast, E and a DHA-rich microalgae on sperm motion characteristics L. D. Goedde*1, K. M. Brennan2, B. A. Ball1, L. M. Lawrence1, M. H. Troedsson1, E. L. Squires1, 1University of Kentucky, Lexington, KY, USA, 2Center for Animal Nutrigenomics and Applied Animal Nutrition, Alltech Inc., Nicholasville, KY, USA 2:45 pm 130 Effect of dietary omega-3 supplementation on equine endometrial and embryonic gene expression R. D. Jacobs*1, A. D. Ealy1, P. M. Pennington2,3, B. Pukazhenthi2, L. K. Warren4, A. L. Wagner5, A. K. Johnson6, T. M. Hess7, R. K. Splan1,8, 1Virginia Polytechnic Institute and State University, Blacksburg, VA, USA, 2Smithsonian Conservation Biology Institute, Front Royal, VA, USA, 3George Mason University, Fairfax, VA, USA, 4University of Florida, Gainesville, FL, USA, 5Cooperative Research Farms, Richmond, VA, USA, 6Auburn University, Auburn, AL, USA, 7Colorado State University, Fort Collins, CO, USA, 8Virginia Tech Center, Middleburg, VA, USA 3:00 pm 131 Effect of docosahexaenoic acid supplementation on corpus luteum perfusion at day seven post-ovulation R. L. Piersanti*, A. M. Adkin, L. K. Warren, C. J. Mortensen, University of Florida, Gainesville, FL, USA 3:15 pm 132 Identification of GnRH isoforms and their cognate receptors in the equine testis C. J. Douthit*1, R. A. Cederberg2, A. T. Desaulniers2, J. M. Kouba1, T. L. Douthit1, D. M. Grieger1, B. R. White2, 1Kansas State University, Manhattan, KS, USA, 2University of Nebraska, Lincoln, NE, USA 3:30 pm Refreshment Break (Banyan Breezeway)

Undergraduate Student Competition (3) Moderator: Kris Hiney, Oklahoma State University Citrus (Jacaranda Hall)

1:45 pm 10 Oat β-glucan does not mitigate changes to leukocyte populations in response to stress M. R. Di-Lernia*, J. M. Bobel, J. R. Abbott, M. T. Long, L. K. Warren, University of Florida, Gainesville, FL, USA 2:00 pm 11 Intestinal absorption of different compounds in the horse J. E. Skinner*1, A. J. Cawdell-Smith1, J. R. Biffen2, A. M. Talbot2, H. L. Regtop2, W. L. Bryden1, 1Equine Research Unit, The University of Queensland, Gatton, Queensland, Australia, 2Agricure Pty. Ltd., Braemar, New South Wales, Australia 2:15 pm 12 Effects of horse age and feeding status on AMPK activation in horses S. E. Sivinski*, A. L. Wagner, S. L. Tanner, T. Brewster-Barnes, K. L. Urschel, University of Kentucky, Lexington, KY, USA 2:30 pm 13 Tumor necrosis factor-α gene expression before and after exercise in middle-aged and older horses M. M. Darby*1, S. R. Malone1, D. W. Horohov2, D. E. Chappell1, 1Morehead State University, Morehead, KY, USA, 2University of Kentucky, Lexington, KY, USA 2:45 pm 14 Weight load does not affect equine stress as measured by heart rate, salivary cortisol, and behavior M. M. Ernst*, L. R. Hamm, M. L. Santiago, C. A. Shea Porr, Murray State University, Murray, KY, USA 3:00 pm 15 The effects of interval versus continuous conditioning on physiological and kinematic parameters of equine fitness L. M. Taylor*, K. J. Duberstein, K. K. Turner, University of Georgia, Athens, GA, USA

14 Wednesday Orals 15

, E. A. E. A. ,

4 Georgia 2

Lincoln Memorial Lincoln 2

, A., Griffin 2 , USA MI, Lansing, East Gainesville, FL, , , Gainesville, USA , of Vermont University 5 Gainesville, FL,, Gainesville, USA in vitro bovis Streptococcus

, G. A., Shelle 6

, GA, USA Berry, , Mount , USA KY, , Lexington, University of Kentucky 1 University of Florida , 1 , 2,1 , , USA KY, Lexington, 1 Berry College 1 , B. J. McIntosh B. J. , , , University Michigan State 3 2 , 1 , , eXtension 4 , M. D. Flythe , M. D. , L. K. Warren Murfreesboro, TN, USA University, Murfreesboro, State Middle Tennessee 2 2,1 , USA KY, , Lexington, University of Kentucky 1 , , C. M. Brady , 1 , J. A. Wilson , J. 2 1 Middleburg, VA, USA Middleburg, VA, , , USA NE, Lincoln, , P. A. Harris , P. , I. A. Kagan 1 1 Sabal (Jacaranda Hall) Sabal (Jacaranda , C. Skelly , Glades (Jacaranda Hall) Glades (Jacaranda 1 Jasmine (Jacaranda Hall) Jasmine (Jacaranda , A. A. Adams , A. G. Foster 2 2 Atlanta, GA, USA , Atlanta, , , Virgina Tech 6 , , USA IN, Lafayette, West

, C. M. Latham 1 Iowa State University State Iowa Miller, Peggy Moderator: , L. M. Lawrence , P. L. Wood , P. 1 , Z. Cochran 1 , K. P. Anderson P. K. , 1 1 Harrogate, TN, USA Harrogate, Fort Collins, CO, USA CO, Collins, Fort , , of Nebraska University Mississippi State University Mississippi State Cavinder, Clay Moderator: 1 North Carolina State University North Carolina State Yoder, Mike Moderator: , , 5 , , University Purdue Melton Mowbray, Leicestershire, UK Leicestershire, Mowbray, Nutrition, Melton Pet for Centre WALTHAM Lexington, KY, USA KY, Research Unit, Lexington, Production Service, Forage-Animal Agricultural Research USDA, Teaching and Extension: Graduate Student Competition Student Graduate and Extension: Teaching Institute of Technology of Institute Breezeway) (Banyan Break Refreshment Effect of inulin chain length on fermentation by equine fecal and bacteria fecal by equine fermentation on of inulin chain length Effect B. E. Harlow* in horses response on glycemic hay soaked versus of dry The effect R. L. Collins*, H. S. Spooner, M. Hoffman, J. syndrome metabolic horses with equine in profiles inflammatory of lipid and Characterization S. E. Elzinga* University, Wearable biometric sensors for horses and rider-centered interface and rider-centered horses for sensors biometric Wearable R. E. LeRoy* in horses excretion phosphorus relevant on environmentally and source level of dietary Effects L. A. Skurupey* 3 2 2 Differing levels of experience and education affect learners’ changes in knowledge and skills knowledge in changes affect learners’ experience and education of levels Differing Differential miRNA expression from sperm obtained in the different regions of the epididymis regions of the in the different obtained from sperm expression miRNA Differential Colorado State E. Bruemmer, Bouma, J. Bass, G. J. Belk, L. D. A. D. K. M. Klohonatz, H. M. Twenter*, University, spermatozoa stallion cold-stored for inclusion in diluents pyruvate L-Carnitine and USA University, Springfield, MO, T. Northcutt, Missouri State Webb, B. Onyango, W. G. S. Potter*, D. sperm function stallion on stress and heat peroxide hydrogen of Effect University of Florida Mortensen, R. I. Chun, C. J. A. M. Mesa*, R. L. Roberson, USA KY, University, Murray, Murray State Porr, C. A. Shea M. L. Santiago, M. L. Bedron*, acquisition skill of and practical knowledge on the course training of an equine Assessing the effect freshman incoming OK, USA University, Stillwater, Oklahoma State K. M. Hiney, S. R. Cooper, K. Taylor*, T. study A demographic industry: competition of the Information-seeking IN, USA Lafayette, Purdue University, West C. M. Brady, M. A. Voigt, E. A. Lofgren*, issues for current tools as educational webinars online eXtension of Effectiveness K. E. Pulec* K. Greene , , USA VT, Burlington, Reproductive Physiology: Graduate Student Competition (2) Competition Student Graduate Physiology: Reproductive Production and Management: Graduate Student Competition (4) Competition Student Graduate Production and Management: 97 98 99 16 96 146 133 134 135 147 148 149 3:30 pm 4:15 pm 4:30 pm 4:45 pm 3:15 pm 4:00 pm 4:00 pm 4:00 pm 4:15 pm 4:30 pm 4:15 pm 4:30 pm pm 4:45 Undergraduate Student Competition (4) Moderator: Janice Holland, Midway College Citrus (Jacaranda Hall)

4:00 pm 17 Demographics, body condition scores, and owner bodyweight estimations of adult draft and warmblood horse breeds A. M. Hansen*1, D. N. Catalano1, R. J. Coleman2, M. R. Hathaway1, M. E. McCue1, A. K. Rendahl1, K. L. Martinson1, 1University of Minnesota, St. Paul, MN, USA, 2University of Kentucky, Lexington, KY, USA 4:15 pm 18 Effect of different blanket weights on surface temperature of horses in cold environments C. S. Slaubaugh* and C. J. Hammer, North Dakota State University, Fargo, ND, USA 4:30 pm 19 Effects of ivermectin and moxidectin on equine parasites in horses in western Kentucky L. R. Hamm*, M. M. Ernst, M. L. Santiago, C. A. Shea Porr, Murray State University, Murray, KY, USA 4:45 pm 20 Efficacy of Carica papaya seeds for reducing equine strongyle fecal egg counts S. Samuels*, N. Heskett, S. Burk, Otterbein University, Westerville, OH, USA

Workshop 5:15–6:45 pm The internet of things: Using innovation to enhance teaching and extension Leaders: Karen L. Waite, Colleen Brady, Kathy Anderson, and Craig Wood Island Ballroom (Tarpon/Sawyer/Long Key)

Other Activities

Gator Growl Dinner 7:00–9:00 pm Garden Courtyard (outdoors)

Special guests Lynn Palm, Palm Partnership Training Randy and Patty Barthle, Barthle Brothers Ranch Lisa Conti, Florida Deputy Commissioner of Agriculture David and Karen O’Conner, O’Connor Equestrian Lonny Powell and Patrick Vinzant, Florida Thoroughbred Breeders and Owners Association Bryan and Holley Rice, Woodside Ranch Eduardo Valdes, Disney’s Animal Kingdom

Sponsored by Seminole Feeds Department of Animal Sciences University of Florida Florida Thoroughbred Breeders and Owners Association Etalon Diagnostics Ocala Breeder’s Feed and Supply

16 Thursday Posters 17 Virginia 2 USDA, Agricultural USDA, 2 United States Department Department States United 2 Livestock Conservancy, Livestock 2 , University of Kentucky East University, East Michigan State 3 2 , Ocala, FL,, Ocala, USA

Richmond, VA, Richmond, VA, Farms, Research Cooperative , USA VA, , Blacksburg, Virginia Tech 5 Athens, GA, USA , Athens, 1 , 5 Edinburgh, Scotland , Edinburgh, , USA , Middleburg, VA,

College of Central Florida College of Central , A. L. Wagner 4

University of Maryland , USA KY, , Lexington, University of Kentucky 1 Colorado State University Colorado State , USA KY, , Lexington, University of Kentucky 1 , , 2,1 2,1 , S. Mastellar 3 Banyan Breezeway Banyan Banyan Breezeway Banyan Nutrition: Posters Nutrition: University of Edinburgh 1 , Thursday, May 28 May Thursday, 2 Sponsored by Populous Group Populous by Sponsored Invited Speaker—Genetics Invited , MS, USA University, Mississippi State, Mississippi State , M. D. Flythe , M. D. 1 Exercise Physiology: Posters Physiology: Exercise 1

Poster Presentations , M. D. Flythe , M. D. , 1 2 , K. L. Urschel Chair: Amy Burk, Chair: Amy Lexington, KY, USA KY, , Lexington, Island Ballroom (Tarpon/Sawyer/Long Key) (Tarpon/Sawyer/Long Island Ballroom 1,2 Chair: Tanja Hess, Chair: Tanja , B. D. Nielsen , B. D. Moderator: Samantha Brooks, University of Florida Brooks, Samantha Moderator: , USA University, Brookings, SD, State South Dakota 1 4

Gluck Equine Research Center, University of Kentucky, Lexington, KY, USA KY, Lexington, University of Kentucky, Center, Research Gluck Equine , J. Beranger , J. 1 , L. M. Lawrence , R. K. Splan 1 1 , L. M. Lawrence 1 Genetics After TWILIGHT After Genetics Ernie Bailey, Breezeway) (Banyan Break Refreshment Physiology Reproductive Nutrition, and Genetics, Physiology, Session 1—Exercise Poster Pittsboro, NC, USA NC, Pittsboro, Lansing, MI, USA horses fatigued in recovery muscle to improved leads supplementation dietary Post-exercise Jacobs* R. D. of Agriculture, ARS-FAPRU Tech Middleburg Agricultural Research and Extension Center and Extension Middleburg Agricultural Research Tech Attitude and behavior of surrounding the use of complementary and alternative veterinary medicine and alternative complementary the use of surrounding veterinarians of and behavior Attitude pain musculoskeletal of equine treatment in the (CAVM) A. E. Bergenstrahle*

Effect of storage time and temperature of equine on the subsequent enumeration of lactobacilli and of lactobacilli enumeration feces on the subsequent of equine temperature time and storage of Effect cellulolytic bacteria B. E. Harlow* , USA KY, Lexington, Lexington, KY, USA KY, Research Unit, Lexington, Production Service, Forage-Animal Research meal concentrate a after lactobacilli in fecal Changes M. B. Pyles* USA pilot study horse—A race in the Thoroughbred Double suspension gallop Downer*, V. J. A. Youmans, S. N. Timberlake, A. Owens, and asymmetrical with symmetrical compared non-loaded horses in trot the at symmetry of gait An assessment load distribution University of Georgia L. Cobb, H. Newman, S. Lalvani, Duberstein*, K. J. horse of the Choctaw gaits stepping of the intermediate Stride variables M. Nicodemus* 30 29 9:00–9:30 am 9:00–10:30 am 8:00–9:00 am 65 66 31 32 33 67 Influence of maternal dietary yeast supplementation on the diversity of hindgut microbial populations of Quarter Horse mares and their offspring E. R. Share, K. Barnhart, J. M. Reddish, K. Cole*, The Ohio State University, Columbus, OH, USA 68 Supplementation withLactobacillus acidophilus influences microbial diversity in the gastrointestinal tracts of healthy horses K. Barnhart, J. M. Reddish, K. Cole*, The Ohio State University, Columbus, OH, USA 69 Influence of probiotic supplementation on microbial diversity in the gastrointestinal tract of Miniature Horses K. Barnhart, J. M. Reddish, K. Cole*, The Ohio State University, Columbus, OH, USA 70 Dietary energy influences on water intake and fecal and urine outputs in mature horses M. J. Williams*, E. R. Share, K. L. Barnhart, K. Cole, The Ohio State University, Columbus, OH, USA 71 Effects of the novel feed additive Phytozen on immune and endocrine function in senior horses M. H. Siard*1, A. L. Wagner2, B. Medina3, I.D. Girard4, A. A. Adams1, 1University of Kentucky, Lexington, KY, USA, 2Cooperative Research Farms, Richmond, VA, USA,3 Laboratoires Phodé, Albi, France, 4Probiotech International, Inc., Saint-Hyacinthe, Quebec, Canada 72 Immunoglobulin subclasses in colostrum and plasma of Quarter Horse mares and fed diets with or without added probiotics A. Sutton1, A. Moffett2, W. B. Staniar*1, P. Harris3, 1The Pennsylvania State University, University Park, PA, USA, 2MARS Horsecare US Inc, Dalton, OH, USA, 3WALTHAM Centre for Pet Nutrition, Waltham on the Wolds, Leicestershire, UK 4 Fecal fatty acids in yearlings fed diets differing in carbohydrate fractions P. Ochonski*, D. Oliver, K. Norris, M. Baldin, K. Harvatine, W. B. Staniar, The Pennsylvania State University, University Park, PA, USA 73 Crude protein from forage correlates with nitrogen retention and nitrogen status in adult horses P. M. Graham-Thiers*, L. K. Bowen, Emory and Henry College, Emory, VA, USA 74 Novel method for determining the ideal amino acid profile for a growing horse’s ration M. Schultz*, K. Martinson, C. Ward, M. Pampusch, M. Hathaway, University of Minnesota, St. Paul, MN, USA 75 A technique for collecting ileal digesta through cecal cannulas in the equine T. K. Dove*, J. M. Lattimer, W. L. Beard, E. A. Taylor, T. L. Douthit, Kansas State University, Manhattan, KS, USA 76 Validation of a human double-antibody radioimmunoassay kit for measuring equine C-peptide E. W. Goertzen*, K. E. Lloyd, J. W. Spears, P. M. Siciliano, S. E. Pratt-Phillips, North Carolina State University, Raleigh, NC, USA 77 Influence of bioactive in varying doses on gait kinematics in mature horses J. A. Coverdale*1, J. M. Campbell2, 1Texas A&M University, College Station, TX, USA, 2APC Inc., Ankeny, IA, USA 78 Influence of omega-3 polyunsaturated fatty acid supplementation on plasma prostaglandin E2 production in young exercising horses K. B. Pritchett*, J. L. Leatherwood, B. Vandergrift, M. J. Anderson, K. J. Stutts, M. M. Beverly, S. F. Kelley, EquiVision Inc., Huntsville, TX, USA 79 Feeding free-choice hay to starving horses T. M. Hess*, C. Wilkins, H. F. Santos, Colorado State University, Fort Collins, CO, USA

Genetics: Posters Chair: Rebecca Splan, Virginia Tech Banyan Breezeway

37 Genome-wide association study of Shivers J. L. Petersen*1, C. J. Finno2, S. J. Valberg3, 1University of Nebraska, Lincoln, NE, USA, 2University of California, Davis, CA, USA, 3University of Minnesota, St. Paul, MN, USA

18 Thursday Posters 19

, , Botucatu, SP, Brazil, SP, Botucatu, Baton Rouge, LA, Rouge, , Baton Tijucas do Sul, PR, Brazil PR, do Sul, Tijucas

School of Veterinary Medicine and School of Veterinary 1 , 1 , C. Meira 1 , , Farm Águas JM Horse 3 Louisiana State University Agricultural Center University Louisiana State 1 Louisiana State University Agricultural Center University Louisiana State , 1

Murfreesboro, TN, University, Murfreesboro, State Middle Tennessee 1

, 1 , R. Schmith 3 Louisiana State University Agricultural Center Louisiana State 2 ctivities , N. A. Valencia 1,2 , P. F. Lima F. , P. 1 Baton Rouge, LA, , USA Rouge, Baton , H. S. Spooner orkshops 1 7:00–9:00 pm , UNESP Animal Science, and Medicine School of Veterinary 1 Student Social Student Banyan Breezeway Banyan W , , 3 ther A O Fort Scott, KS, USA Scott, , Fort , J. C. Ferreira , J. 1 , Y. L. Boakari , Y. 2 , A. , Boof 2 , R. M. Hoffman Texas Tech University Tech Texas Brady, Chair: Heidi 1 Reproductive Physiology: Posters Physiology: Reproductive Chair: Brittany Harlow, University of Kentucky Harlow, Chair: Brittany Botucatu, SP, Brazil SP, , Botucatu, UNESP Medicine and Animal Science, School of Veterinary 2 Breck Beach (outdoors, in front of Breck Deck North) of Breck in front Beach (outdoors, Breck

, E. L. Oberhaus 1 Sponsored by Farnam: A Division of Central Garden and Pet Garden Division of Central A Farnam: by Sponsored , D. L. Thompson , D. , D. L. Thompson L. D. , , J. C. Haffner C. , J. 1,2 1,2 1,2 Jasmine (Jacaranda Hall) Jasmine (Jacaranda Schaafstra Doorn and Femke van David Leaders: Hall) Jasmine (Jacaranda own Lunch on your welfare and behavior to enhancing equine approach strategic science and learning theory—A Equitation curriculum and Carissa Wickens Waite, Merkies, Karen Katrina Greene, Betsy Heleski, Colleen Brady, Camie Leaders: Hall) Sabal (Jacaranda tenure and promotion, reappointment, for Tips Bump and Karin Burk, Laurie Lawrence, Amy Leaders: Undergraduate program assessment and accreditation—Building a collaborative peer based model collaborative a accreditation—Building and assessment program Undergraduate and Bob Coleman Michael Fugaro, Bump, Laurie Lawrence, Karin Leaders: Hall) Sabal (Jacaranda protocol? research a standardized for criteria define we coefficients—Can equine digestibility Determining Botucatu, São Paulo, Brazil São Paulo, , Botucatu, UNESP Institute, Biosciences Fort Scott Community College Scott Fort 3 2 , , , , Agricultural Center University Louisiana State USA Baton Rouge, LA, USA Rouge, Baton in mares parameters reproductive on oil source of dietary Influence C. M. Crain* Factors affecting basal and post-exercise prolactin secretion in horses in prolactin secretion basal and post-exercise affecting Factors E. L. Oberhaus, N. A. L. Thompson*, Valencia, D. L. C. DiGiovanni, Progesterone-releasing intravaginal device in conjunction with estradiol benzoate induces follicular regression in mares regression follicular induces benzoate with estradiol conjunction in device intravaginal Progesterone-releasing Ferreira* C. J. in mares lutea corpora of evaluation for as a tool biopsy ultrasound-guided Transvaginal C. Ferreira* J. Botucatu, São Paulo, Brazil, São Paulo, , Botucatu, UNESP Animal Science, 2 Mississippi State, MS, USA , Mississippi State, University H. King, Mississippi State E. Memili, M. Nicodemus*, R. Hopper, K. Matheny, vegetable a of injection of sulpiride in site Effect of dose and geldings: estrogen-primed in secretion Prolactin vehicle shortening LA,, USA Rouge, Baton Effects of resveratrol on post-thaw quality of stallion sperm stallion quality of on post-thaw resveratrol of Effects L. Thompson* D. USA 143 142 145 144 12:30–2:00 pm 2:00–3:30 pm 2:00–3:30 pm 11:00 am–12:30 pm 11:00 am–12:30 pm 141 140 Friday, May 29

Oral Presentations and Plenary Sessions

Invited Speaker—Teaching and Extension Sponsored by The Sanctuary Moderator: Patricia Harris, Waltham Centre for Pet Nutrition Island Ballroom (Tarpon/Sawyer/Long Key)

8:00–9:00 am Donkeys are Different Alex Thiemann, The Donkey Sanctuary, Sidmouth, Devon, United Kingdom

Nutrition: General Session (1) Moderator: W. Burton Staniar, The Pennsylvania State University Sabal (Jacaranda Hall)

9:15 am 54 Preliminary study on the effect of DHA-yeast enriched product supplementation P. Grimm*, V. Julliand, Agrosup Dijon, Dijon, Bourgogne, France 9:30 am 55 The effect of n-3 polyunsaturated fatty acids (DHA) and prebiotic supplementation on inflammatory cytokine production and immune responses to vaccination in old horses A. A. Adams*1, K. R. Vineyard2, M. E. Gordon2, S. Reedy1, M. H. Siard1, D. W. Horohov1, 1University of Kentucky, Lexington, KY, USA, 2Purina Animal Nutrition, Gray Summit, MO, USA 9:45 am 56 Effect of pituitary pars intermedia dysfunction in horses on and glutamine transport in jejunal brush border membrane vesicles J. L. De Vries1, H. C. Schott1, C. Diard2, D. P. Chamberlin1, N. L. Trottier*1, 1Michigan State University, East Lansing, MI, USA, 2Institut National Supérieur des Sciences Agronomiques de l’Alimentation et de l’Environnement, Dijon, France 10:00 am 57 Evaluation of apparent total-tract digestibility and glycemic responses to processed corn in non-exercised Thoroughbred horses C. Whitehouse*1, J. D. Pagan1, R. J. Coleman2, B. Waldridge1, O. L. Yates1, S. W. Garling1, 1Kentucky Equine Research, Versailles, KY, USA, 2University of Kentucky, Lexington, KY, USA 10:15 am 58 Effect of non-structural carbohydrate intake on glycogen repletion following intense exercise J. D. Pagan*1, V. S. Mesquita2, S. J. Valberg3, B. Waldridge1, C. Whitehouse1, 1Kentucky Equine Research, Versailles, KY, USA, 2Universidade Estadual Paulista, Brazil, 3University of Minnesota, St. Paul, MN, USA 10:30 am Refreshment Break (Banyan Breezeway)

Reproductive Physiology: General Session Moderator: Gary Webb, Missouri State University Jasmine (Jacaranda Hall)

9:15 am 136 Peripartum maternal DHA/EPA supplementation and the effect on mare reproductive parameters and bone metabolism S. E. Buist*1,2, J. M. Kouba2, J. D. Lillich2, C. A. Blevins2, D. G. Grieger2, J. Stevenson2, S. Webel3, 1The Pennsylvania State University, University Park, PA, USA, 2Kansas State University, Manhattan, KS, USA, 3JBS United, Sheridan, IN, USA 9:30 am 137 Determination of peripheral progestin concentrations in the late pregnant mare based upon immunoassays and liquid chromatography-tandem mass spectrometry M. A. A. Wynn*1, E. L. Legacki2, A. J. Conley2, S. A. Loux1, A. Esteller-Vico1, S. D. Stanley2, E. L. Squires1, M. H. T. Troedsson1, B. A. Ball1, 1University of Kentucky, Lexington, KY, USA, 2University of California–Davis, Davis, CA, USA

20 Friday Orals 21

, , E. 3 Waltham Waltham

2 , University 1 School of

, 1 1 , 1 University of 2 , K. M. Brennan 2 Gainesville, FL,, Gainesville, USA Equine Research Unit, The Unit, Research Equine 1 , , 1 , C. Meira 1 Certified Horsemanship 3 , K. A. Lawyer 1 Lincoln, , Lincoln, University of Nebraska 1 Braemar, New South Wales, Australia South Wales, New Braemar, Cazenovia, NY, USA NY, , Cazenovia, CJC Adventures , Clinic and Hospital Equine Wisconsin 2 2 , L. D. Goedde , L. D. , 2 2 Louisiana State University Agricultural University Agricultural State Louisiana 2 , W. L. Bryden L. W. , , J. Mead , J. 2 1 , USA KY, , Lexington, University of Kentucky University of Florida Melbourne, Victoria, Australia , Melbourne, Victoria, 2 , L. F. Novaes Filho Novaes , L. F. 1 , J. R. Biffin J. , 2

, K. Biodrowski , , Ltd. Pty. Agricure 1 , H. Wiemers 2 2 , M. H. Troedsson Alhambra, IL,Alhambra, , USA 2 , USA NY, , Cazenovia, Wagga Wagga, NSW, Australia NSW, Wagga, Charles Sturt University, Wagga Texas A&M University Texas 1 , H. S. Canesin , 1 1 , A. , Talbot M. , IN, USA Lafayette, Purdue University, West 2 1 , C. Jehlick 3 , Mississippi State University Mississippi State 2 , D. Anderson , D.

, TN, USA , Harrogate, 1 University of Melbourne 1 , 1 , L. M. Lawrence 2 East Lansing, MI, USA University, East Michigan State , USA KY, , Lexington, Clubs States United , P. Barger , P. , G. K. Noble , Y. L. Boakari L. , Y. 2 1 , H. L. Regtop L. H. , Cazenovia College Cazenovia 2 2 1 1 , Sabal (Jacaranda Hall) Sabal (Jacaranda , M. Stauffer Glades (Jacaranda Hall) Glades (Jacaranda 1,2 1 , D. J. Hagstrom J. , D. , , and Associates L.H. Breuer 1 , B. A. Ball 1 , , Australia Queensland, Gatton, 2 , , , S. R. Bailey* 2 2 , P. Harris , P. 1 Nutrition: General Session General (2) Nutrition: , G. Stauffer 1 , W. R. Gombeski , W. , D. L. Thompson , D. 1 , T. S. Williams , T. , A. E. Harris 1,2 Lincoln Memorial University Memorial Lincoln , D. Langer D. , , A. J. Cawdell-Smith A. , J. 1 1 1 1,2 1 , G. Doran Moderator: Josie Coverdale, Josie Coverdale, Moderator: , Lexington, KY, USA KY, , Lexington, 1 , P. A. Harris , P. , K. E. Scoggin 2 1 Moderator: Dean Jousan, Moderator: 1 , Omaha, NE, USA Society Humane Nebraska Teaching and Extension: General Session General (1) and Extension: Teaching 2 Baton Rouge, LA, USA Rouge, , Baton , Urbana, IL, USA Leicestershire, United Kingdom United Nutrition, Leicestershire, Pet for Centre WALTHAM Nicholasville, KY, USA KY, Inc., Nicholasville, and Applied Animal Nutrition, Animal Nutrigenomics Alltech for Center jumpers show among elite intakes and practices Feeding USA University, Raleigh, NC, North Carolina State S. E. Pratt-Phillips*, from morphometric percentage fat body estimate to condition index body of a new Derivation score Comparison with body condition measurements: Potter S. J. Effects of exercise and on antioxidant status and mitochondrial function in young, function in pleasure- and mitochondrial status and selenium on antioxidant exercise of Effects horses trained L. K. Warren, S. Wohlgemuth, C. Li, L. A. Skurupey, S. H. White*, State-level industry study to determine equine policy and program priorities equine policy and program determine to study industry State-level Bump* K. D. Prevention of horse-related injuries: Where education efforts should be focused should be efforts education injuries: Where of horse-related Prevention C. Camargo* F. Association participants show to assess sportsmanship among horse a survey validating and Creating C. Heleski, M. Ewing, K. L. Waite*, Round Up 4-H Horse National the 2014 Eastern at outcomes assess youth to Using 4-H Common Measures C. M. Brady* Melton Mowbray, Leicestershire, UK Leicestershire, Mowbray, Nutrition, Melton Pet for Centre orthopedic developmental on diets of selenium and molybdenum in mare effects on the Observations study case foals—A disease in L. H. Breuer* L. Squires* in horses concentrations urine blood and alters magnesium supplementation Oral A. Dodd* J. , , of Queensland University Center acid (DHA) docosahexaenoic of dietary Effect spermatozoa: lipidomics of stallion Non-targeted L. Wood P. mares in of partial luteolysis Characterization C. Ferreira* J. 2 K. P. Anderson* K. P. Effectiveness of extension training for law enforcement officials responding to equine calls to equine responding officials enforcement law for training extension of Effectiveness 3 Extent of vitamin K absorption from the equine hindgut from K absorption of vitamin Extent Skinner* E. J. Oconomowoc, WI, USA WI, Oconomowoc, Key) Luncheon (Island Ballroom—Tarpon/Sawyer/Long Speaker Invited Botucatu, SP, Brazil, SP, , Botucatu, UNESP Science, Medicine and Animal Veterinary Illinois Breezeway) (Banyan Break Refreshment , NE, USA , USA KY, , Lexington, of Kentucky 62 63 61 151 152 153 154 64 60 139 138 150 59 11:45 am 12:00 pm 11:30 am 9:30 am 9:45 am 10:00 am 10:15 am 12:15 pm 11:15 am 10:00 am 9:45 am 9:15 am 11:00 am 12:30 pm 10:30 am Production and Management: General Session (1) Moderator: Rebecca Splan, Virginia Tech Jasmine (Jacaranda Hall)

11:00 am 100 Distal forelimb asymmetries in the domestic horse S. R. Malone*1,2, H. M. S. Davies2, 1Morehead State University, Morehead, KY, USA, 2The University of Melbourne, Parkville, VIC, Australia 11:15 am 101 Measuring conformation in , , and donkeys ( asinus) from Spanish and Portuguese populations A. K. McLean*1, W. Wang1,2, A. Heartfield1,3, J. B. Rodrigues1,4, 1North Carolina State University, Raleigh, NC, USA, 2Palo Alto Medical Foundation Research Institute, Palo Alto, CA, USA, 3Texas A&M University, College Station, TX, USA, 4University Lusófona de Humanidades e Tecnologias, Lisbon, Portugal 11:30 am 102 Comparative efficacy of meloxicam oral suspension and phenylbutazone in horses with chronic musculoskeletal disease M. E. Olson1, L. D. Burwash*2, B. J. Ralston2, D. M. Nagel3, S. L. Custead3, K. A. Penttila4, 1Bow Valley Research, Calgary, Alberta, Canada, 2Alberta Agriculture and Rural Development, Airdrie, Alberta, Canada, 3Nagel and Co. Veterinary Services Ltd., Crossfield, Alberta, Canada, 4Burwash Equine Services, Calgary Alberta, Canada 11:45 am 103 Efficacy of meloxicam oral suspension in controlling pain and inflammation following castration in horses M. E. Olson1, E. E. Fierheller2, L. D. Burwash*3, B. J. Ralston3, C. P. Schatz1, H. R. Matheson-Bird1, 1Bow Valley Research, Calgary, Alberta, Canada, 2University of Calgary, Calgary, Alberta, Canada, 3Alberta Agriculture and Rural Development, Airdrie, Alberta, Canada 12:00 pm 104 Shade use in dry lots by captive wild horses K. E. Holcomb*, C. L. Stull, Population Health and Reproduction, Cooperative Extension, School of Veterinary Medicine, University of California–Davis, Davis, CA, USA 12:15 pm 105 Association between whorls and personality in horses N. H. Sereda, T. Kellogg, T. Hoagland, J. Nadeau*, University of Connecticut, Storrs, CT, USA 12:30 pm Invited Speaker Luncheon (Island Ballroom—Tarpon/Sawyer/Long Key)

Teaching and Extension: General Session (2) Moderator: David Denniston, Colorado State University Glades (Jacaranda Hall)

11:00 am 155 Behavioral changes associated with participation in 4-H horse programs L. M. Cottle*, L. Karr-Lilienthal, University of Nebraska–Lincoln, Lincoln, NE, USA 11:15 am 156 Use of Soft Chalk technology in equine science classes to provide an interactive study tool L. M. Cottle*, K. P. Anderson, L. Karr-Lilienthal, K. Pulec, University of Nebraska-Lincoln, Lincoln, NE, USA 11:30 am 157 Delivering an online introductory horse course to a varied audience C. D. Skelly*, K. L. Waite, G. A. Shelle, Michigan State University, East Lansing, MI, USA 11:45 am 158 Teaching to the masses: Experiences in offering an equine-oriented massive open online course C. J. Mortensen*, A. M. Nicholson, University of Florida, Gainesville, FL, USA 12:00 pm 159 Teaching equine courses in the flipped format is proving to be a modern approach to today’s classrooms C. J. Mortensen*, A. M. Nicholson, University of Florida, Gainesville, FL, USA 12:15 pm 160 A comparison of traditional versus flip-class teaching methods on student satisfaction and assessment T. N. Jones*, Tarleton State University, Stephenville, TX, USA 12:30 pm Invited Speaker Luncheon (Island Ballroom—Tarpon/Sawyer/Long Key)

Invited Speaker Luncheon—Production and Management Sponsored by Buckeye Nutrition Moderator: Janice Holland, Midway College Island Ballroom (Tarpon/Sawyer/Long Key)

12:30 pm Buffet lunch service begins 1:00–2:00 pm Equine Metabolic Syndrome: A complex disease influenced by genetics and the environment Molly McCue, University of Minnesota, St. Paul, MN, USA

22 Friday Orals 23

, Old , 8 Sam 2 West West 4 College Station, College Station, New Brunswick, NJ, NJ, Brunswick, New Clemson University , M. Volgesang 6 7 , University of Kentucky 1 The University of , 2 1 , , Ltd. Care UK Mars Horse 2 , , , K. Waite 6 Baton Rouge, LA,, USA Rouge, , Baton Slippery Rock University, Slippery Slippery Rock 2 , USA Collins, CO, , Fort Texas A&M University, Texas 8 Gainesville, FL, , Gainesville, USA , E. S. Vanzant 1 Fargo, University, Fargo, State North Dakota Waltham-on-the-Wolds, Leicestershire, UK Leicestershire, Waltham-on-the-Wolds, 10 , K. Vernon Gainesville, FL,, , Gainesville, USA 5 , USA Morehead, KY,

, A. J. Pescatore , A. J. 1 Fayetteville, AR, USA , Fayetteville, , S. TenBroeck 4 University of Minnesota Tregaron, Ceredigion, Wales, UK Wales, Ceredigion, Tregaron, Colorado State University Colorado State 3 , Jersey University of New the State Rutgers, University of Florida 1 5 , Gray Summit, MO, USA , Gray Summit, MO, Purina Animal Nutrition LLC 2 Colorado State University State Colorado , , ELNS 1 , C. Smith , W. J. Silvia J. , W. 3 1 , , 3 , University Morehead State , , Nutrition Pet for Centre Waltham 1 3 , , , 2 Louisiana State University Agricultural Center Louisiana State Sabal (Jacaranda Hall) Sabal (Jacaranda 1 University of Arkansas , OH, USA University, Westerville, Otterbein , R. Brooks Glades (Jacaranda Hall) Glades (Jacaranda , H. Anderson 1 2 , Jasmine (Jacaranda Hall) Jasmine (Jacaranda 1 , A. M. Leed , P. A. Harris P. , , 2 11 2 2 Raleigh, NC, USA University, Raleigh, NC, North Carolina State Westerville, OH, USA University, Westerville, Otterbein 2 , Lansing, MI, USA University, East Michigan State 7 , USA WV, , Morgantown, , J. Miller , J. , S. V. Burk , S. V. 10 , C. Barfoot , , L. B. Kenny , H. M. S. Davies 1 1 1 Exercise Physiology: General Session General Physiology: Exercise Auburn University, Auburn, AL, USA 1,2 Moderator: Tanja Hess, Hess, Tanja Moderator: , J. Leatherwood , J. Michigan State University Michigan State Waite, Karen Moderator: , C. E. Gramlich 1 Keyser, WV, USA WV, College, Keyser, State Potomac 1 , USA PA, University, University Park, State Pennsylvania 11 Teaching and Extension: General Session General (3) and Extension: Teaching 9 , E. Berg Moderator: Krishona Martinson, Krishona Moderator: 9 Cokato, MN, USA Cokato, , LLC Square Meal Feeds 2 Production and Management: General Session General (2) Production and Management: , Wolverton, Buckinghamshire, UK Buckinghamshire, Wolverton, USA , USA KY, Lexington, (Banyan Breezeway) (Banyan Break Refreshment A. C. Longland* The effects of feeding order, time of day, and treatment adaptation on rates of hay and concentrate intake concentrate hay and rates of on adaptation treatment and day, time of feeding order, of The effects M. L. Jerina, K. E. Davison, M. E. Gordon*, grazing horses in and insulin profiles on blood glucose height sward of pasture Effect C. Gill, Siciliano*, J. D. P. per day for 24 hours of ponies pastured daily on bodyweight for 10 hours muzzles grazing wearing of The effect B. Egan racehorses Thoroughbred in and performance asymmetries forelimb radiographic Yearling S. R. Malone* hay and long-stem blocks, biscuits, fed hay output in horses fecal and feed intake, Hydration, C. A. Williams* Gagné and equine : A pedagogical opportunity A pedagogical Gagné and : centers activity and therapy equine-assisted by curricula valued College Burk* S. V. E. L. Wagner*, E. L. Wagner*, outcomes student affect learning outlines positively Student-oriented Hammons, O. J. K. S. Jogan*, Parkville, VIC, Australia VIC, Melbourne, Parkville, Kingdom in the United horses use in endurance and electrolyte management of feed An online survey OK, USA University, Stillwater, Oklahoma State Marlin*, S. Sadler, J. D. of brachii medius and triceps in the gluteus training exercise to submaximal adaptations Mitochondrial equine athletes young University of Florida C. Li, S. Wohlgemuth, L. K. Warren, S. H. White*, National American Collegiate Horsemen’s Association Convention: An effective equine educational venue educational equine effective An Convention: Association Horsemen’s Collegiate American National N. Walker* Rock, PA, USA PA, Rock, of the University at program sciences degree in the animal and food with persistence associated Factors class the capstone Animal Science 101 to From Kentucky: M. G. Rossano* , TX, USA Virginia University , USA ND, , TX, USA University, Huntsville, State Houston , USA Clemson, SC, 108 109 107 106 26 161 163 162 27 28 165 164 3:30 pm 2:45 pm 3:00 pm 2:30 pm 2:15 pm 2:15 pm 2:15 pm 2:45 pm 2:30 pm 2:30 pm 2:45 pm 3:15 pm 3:00 pm Poster Presentations 3:30–4:00 pm Refreshment Break (Banyan Breezeway) 3:30–5:00 pm Poster Session 2—Production and Management, and Teaching and Extension

Production and Management: Posters Chair: Janice Holland, Midway College Banyan Breezeway

111 Fecal egg count survey of feral horses on the Pryor Mountain Range A. N. Neuman*, Rocky Mountain College, Billings, MT, USA 112 Prevalence of strongyle infection in working equids of Egypt and comparison of 3 deworming strategies A. B. A. Ali1,3, M. A. El Sayed2, M. Y. Matoock3, M. A. Fouad3, C. R. Heleski*1, 1Michigan State University, East Lansing, MI, USA, 2The Brooke Hospital for Animals, Cairo, Egypt, 3Cairo University, Giza, Egypt 113 Effects of collection method and season on fecal egg counts in feral horses K. Demme, S. Lapinskas*, M. Webster, D. Baker, J. E. Bruemmer, T. M. Hess, Colorado State University, Fort Collins, CO, USA 114 Detection of Salmonella in equine facility environmental samples by 2 methods A. N. Bradbery*1, J. A. Coverdale1, L. M. Lucia2, G. R. Acuff2, C. J. Hartz1, 1Texas A&M University, College Station, TX, USA, 2Texas A&M Center for Food Safety, College Station, TX, USA 115 Turkey grit is a stable, mud-preventing footing for horse turnouts during wet seasons in the Pacific Northwest D. M. Sherwood*, B. L. Camozzi, G. Bobe, Oregon State University, Corvallis, OR, USA 116 The influence of winter turnout design on horse physical fitness D. M. Sherwood*, L. T. Comerford, G. Bobe, Oregon State University, Corvallis, OR, USA 117 Evaluating the relationship between wild stallion social behavior and reaction to sedation D. M. Sherwood*, M. A. R. Udell, Oregon State University, Corvallis, OR, USA 118 Frequency of stress-related behaviors among therapy horses E. L. Berg*, K. A. LaFond, North Dakota State University, Fargo, ND, USA 119 Use of a head elevation and nasopharyngeal flush model for short-term immune distress in horses J. M. Bobel*, M. T. Long, L. K. Warren, University of Florida, Gainesville, Florida, USA 110 Influence of dietary yeast supplementation on immunoglobulin concentrations in response to vaccination in Quarter Horse mares K. Koke, J. M. Reddish, K. Cole*, The Ohio State University, Columbus, OH, USA 121 Relationship between bodyweight, body condition score, seasonality, and purpose in equines J. Crespo, T. A. Hoagland, J. A. Nadeau*, University of Connecticut, Storrs, CT, USA 122 Forage nutritive value, yield, and preference of under horse grazing D. N. Catalano*, C. C. Sheaffer, A. M. Grev, M. L. Schultz, K. L. Martinson, University of Minnesota, St. Paul, MN, USA 123 Effect of sward height on grazing preference and pasture NSC concentration P. D. Siciliano*, North Carolina State University, Raleigh, NC, USA 124 Determining water-soluble phosphorus in equine manure through sequential water extractions L. A. Skurupey*, L. K. Warren, University of Florida, Gainesville, FL, USA 125 Long-term administration of dopamine antagonist alters prolactin and ACTH concentrations but has no effect on insulin sensitivity in geldings N. Arana-Valencia*, D. L. Thompson, E. L. Oberhaus, Louisiana State University Agricultural Center, Baton Rouge, LA, USA

24 Friday Posters 25 , B. C. 2

University of 4 , N. E. Jack 2 Reading, PA, USA PA, , Reading, USA PA, , Reading, , K. S. Jogan 2 Iowa State University, Ames, IA, State Iowa 1 , Fayetteville, AR, USA , Fayetteville, 4 Albright College Albright College Albright 2 2 , K. P. Coffey , K. P. 2 University of Minnesota, St. Paul, MN, USA, MN, Paul, St. University of Minnesota, 1 , 4 , K. Martinson , K. 2 Murfreesboro, TN, University, Murfreesboro, State Middle Tennessee 1 , , NE, USA , Lincoln, University of Nebraska 2 , T. S. Crook , T. 3 2 University of Arkansas 2 Hamline University School of Law, St. Paul, MN, USA, 4Bettison USA, MN, 4Bettison Paul, St. School of Law, Hamline University 3 , K. Waite Murfreesboro, TN, USA , Murfreesboro, , S. L. Bettison 3 , AR, USA , Fayetteville, , AR, USA , Fayetteville, 3

Gainesville, FL, , Gainesville, USA Brookings, SD, USA University, Brookings, SD, State South Dakota , R. Johnson 2 Banyan Breezeway Banyan , K. K. Gossman 2 , K. Anderson 2 Wooster, OH, USA University, Wooster, The Ohio State Institute, Agricultural Technical , B. C. Colombo 2 University of Arkansas University of Arkansas Teaching and Extension: Posters Extension: and Teaching , USA MO, City, , Jefferson 1 1 , G. Shelle , S. L. Tisdale , , 2 2 , B. D. McSpadden , B. D. 2 2 1

North Carolina State University State North Carolina Yoder, Chair: Mike , C. M. McKenzie , C. Skelly 1 1

, S. A. Wilson , M. K. Jogan , M. K. Jogan 1 1 1,2 Lincoln University Lincoln 1 , 1 , Lansing, MI, USA University, East Michigan State United States Department of Veterans Affairs of Veterans Department States United 2 2 , , Sundown Horse Farm and Shelter, Hugo, MN, USA, Hugo, and Shelter, Horse Farm Sundown Consulting LLC, Minnetonka, MN, USA Minnetonka, Consulting LLC, in North Dakota costs related and health perceptions Horse USA ND, University, Fargo, State North Dakota Hammer, C. J. M. A. Gunkelman*, adult equine program to Florida’s regards in agents extension the needs of Evaluating University of Florida S. M. Hew, C. L. Wickens*, Evaluating knowledge gained through quizzes in an online employer training program for horse industry industry for horse program training online employer in an quizzes gained through knowledge Evaluating professionals M. Auwerda* P. orientation hunt scavenger through students Engaging K. S. Jogan* scoring condition body learning of equine student influence to assignment Use of a semester-long K. Bennet-Wimbush, K. Suagee*, J. Use of protracted “think-pair-share” activity on American Horse Council Welfare Code of Practice Welfare Council Horse activity on American “think-pair-share” Use of protracted and R. C. Bott, H. K. Carroll, S. L. Mastellar*, Incorporating experiential learning for equine-assisted activities and therapies with an in-house equine therapy therapy with an in-house equine therapies activities and for equine-assisted learning experiential Incorporating veterans for program S. A. Newton-Cromwell* Shanks St. Paul, MN, USA , St. Paul, Minnesota riding for horseback calculations expenditure energy measuring and developing to approach Novel College Station, TX, USA A&M University, College Station, Texas E. Sawyer, J. M. M. Vogelsang, Fluckey, D. J. H. Sigler, D. C. L. O’Reilly*, research to exposes undergraduates trial Supplementation K. Clark* J. course physiology exercise in an equine participation research through handling skills gained MS, USA University, Mississippi State, Mississippi State Bova, T. L. Hodge, M. Nicodemus*, volunteers equine undergraduate Recruiting K. S. Jogan* Developing and operating an equine hay bank an equine hay operating and Developing 2 K. L. Martinson* USA USA 167 168 169 174 175 176 177 170 171 172 173 166 Other Activities

ESS General Business Meeting 5:00–6:00 pm Tarpon Key (Island Ballroom)

ESS Awards Banquet 6:30 pm Cocktails/Cash Bar 7:00 pm Dinner and Awards Garden Courtyard (outdoors)

Graduate Student Awards sponsored by North American Equine Ranching Information Council

Undergraduate Student Awards sponsored by Equine Oat Research Advisory Board

Society Awards sponsored by Kentucky Equine Research

AFIA Equine Nutrition Research Award sponsored by American Feed Industry Association

Complimentary Student Registration sponsored by Florida 4-H Horse Program Institute of Food and Agricultural Sciences, University of Florida Office of Research, University of Florida

26 Awards

Outstanding Educator Award This award recognizes an individual who has demonstrated excellence in the area of equine education, either to students or persons in the horse industry. 2015 Recipient: Colleen Brady

Outstanding Young Professional Award This award recognizes an individual under the age of 40 with less than 10 years of service in academia or industry, who has made meritorious contributions to equine science, in teaching, research, public service, or industry. 2015 Recipient: Bridgett McIntosh

American Feed Industry Association (AFIA) Award in Equine Nutrition Research This award is designed to stimulate research excellence in equine nutrition. 2015 Recipient: Laurie M. Lawrence

Equine Science Society and American Society of Animal Science Equine Science Award This award recognizes outstanding achievement in the areas of extension, research, teaching, or agribusiness in the equine industry. 2014 Recipient: Kathleen P. Anderson 2015 Recipient: Carey A. Williams

Distinguished Service in Equine Science Award This award recognizes outstanding contributions to the field of equine science. The award is the most prestigious honor that the Equine Science Society can bestow upon one of its members. 2015 Recipient: Martha Vogelsang

Fellows of the Equine Science Society The Fellow Award recognizes distinguished service to the horse industry and to the Equine Science Society over an extended period of time. 2015 Recipients: Steve Jackson Gary D. Potter Ginger Rich Craig Wood

27 Thank You to Our Sponsors

The Equine Science Society wishes to thank the following sponsors for their support of the 2015 ESS Symposium American Feed Industry Association, Arlington, VA Buckeye Nutrition, Dalton, OH Roy Johnson, Cargill Animal Nutrition, Minnetonka, MN DAC and Minerals, Dover, OH Department of Animal Sciences, University of Florida, Gainesville, FL The Donkey Sanctuary, Devon, UK Equine Oat Research Advisory Board, Louisville, KY Etalon Diagnostics, Menlo Park, CA Farnam: A Division of Central Garden and Pet, Phoenix, AZ Florida 4-H Horse Program, Gainesville, FL Florida Thoroughbred Breeders and Owners Association, Ocala, FL Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL Kentucky Equine Research, Versailles, KY LMF Feeds, Weiser, ID McCauley Bros. Inc., Versailles, KY National Association of Equine Affiliated Academics, Cazenovia, NY North American Equine Ranching Information Council, Louisville, KY : The Horse Healthy Grain, Saskatoon, SK Canada Ocala Breeders Feed and Supply, Ocala, FL Office of Research, University of Florida, Gainesville, FL Otter Farm and Home Coop, Aldergrove, BC, Canada Performance Horse Nutrition, Weiser, ID Populous Group, Norman, OK Poulin Grain, Newport, VT ProBiotech International, Saint-Hyacinthe, QC, Canada Purina Animal Nutrition LLC, Gray Summit, MO Seminole Feeds, Ocala, FL Southern States Cooperative, Richmond, VA Standlee Premium Western Forage, Kimberly, ID Triple Crown Nutrition, Wayzata, MN Tribute Equine Nutrition, Upper Sandusky, OH ZINPRO Performance Minerals, Eden Prairie, MN Zoetis, Florham Park, NJ

28 Sponsors