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E Q SOMETIMES MIRACLES... UINE equine American Edition | October 2020 COME IN PAIRS VETERINARY veterinary EDUCATION/American education Edition Volume 32 Number 10 AND TOGETHER, ASSURE GUARD GOLD-NG AND ASSURE GUARD GOLD CREATE A POWERHOUSE AGAINST YOUR MOST CHALLENGING DIGESTIVE CASES. in this issue: October USE ASSURE GUARD GOLD-NG FOR FAST RELIEF AND MAINTAIN EXCELLENT DIGESTIVE The conundrum of compounded drugs HEALTH WITH ASSURE GUARD GOLD. The official journal of the American Association of Bilateral ovariectomy as a treatment for chronic pyometra in four horses 2020 Equine Practitioners, produced Ask your Arenus Veterinary Solution Specialist how Assure Guard Gold-NG in partnership with BEVA. Use of a carbonated beverage to disintegrate a phytobezoar obstructing and Assure Guard Gold can help your equine patients quickly and the intrathoracic portion of the oesophagus of a horse effectivley recover from the digestive upsets you treat daily. Arenus Animal Health | 866-791-3344 | www.arenus.com EVE-coverspread-10-20.indd 1 9/30/20 9:40 AM equine veterinary education American Edition 0$50#&3t70-6.& t /6.#&3 AAEP NEWS In this issue contents The conundrum of compounded drugs ................................................................. III Longeing considerations for the competition horse ..............................................V AAEP Virtual Convention & Trade Show: Prepare for a new practice era ....... VI Highlights of Recent Clinically Relevant Papers S. WRIGHT ...........................................................................................................................506 Editorial Environmental sustainability in the equine veterinary profession E. WEST AND F. MALALANA ............................................................................................508 Case Reports Reoccurrence of a paranasal osteoma following surgical removal in a 6-month-old Warmblood filly L. MCGLINCHEY, R. COLE AND F. J. CALDWELL ........................................................511 Use of a carbonated beverage to disintegrate a phytobezoar obstructing the intrathoracic portion of the oesophagus of a horse L. C. LIVESEY, E. YORKE, A. PARRA, Q. GRAY, C. DAVIES, D. WELDON, J. SCHUMACHER, S. KIMURA, C. HOWARD, T. SIERRA-RODRIGUEZ AND M. MORA-PEREIRA ..................................................................................................514 Hand-assisted laparoscopic reattachment of a mesoduodenojejunal defect in a broodmare H. D. O’NEILL ......................................................................................................................518 Bilateral ovariectomy as a treatment for chronic pyometra in four horses A. R. E. JONES, C. A. RAGLE, N. A. HUGGONS AND A. A. TIBARY ............................519 Long-term successful outcome of a Streptococcus equi subspecies equi brain abscess H. C. SCHOTT II , M. M. ESSER, C. G. PIRIE, A. P. PEASE, J. S. PATTERSON AND S. M. REED ...................................................................................525 A two-step ovariohysterectomy with unilateral left flank laparoscopic assistance in a Quarter Horse mare D. T. N. KADIC AND A. G. BONILLA................................................................................526 Clinical Commentaries Diagnostic imaging characteristics of sinonasal tumours in the horse R. E. MORGAN ....................................................................................................................512 Management of phytobezoars H. E. BANSE ..........................................................................................................................515 Basic principles of intracorporeal suturing as applied during laparoscopy N. S. WOODFORD AND M. D. WHITTAKER ..................................................................520 Original Articles The influence of rider:horse bodyweight ratio and rider-horse-saddle fit on equine gait and behaviour: A pilot study S. DYSON, A. D. ELLIS, R. MACKECHNIE-GUIRE, J. DOUGLAS, A. BONDI AND P. HARRIS .................................................................................................527 Heineke–Mikulicz pyloroplasty for the treatment of pyloric stenosis secondary to gastro-duodenal ulcer disease in three foals A. V. KENT, D. E. SLONE, C. K. CLARK AND T. M. LYNCH .........................................540 Review Articles Eosinophils of the horse: Part I: Development, distribution, structure and biochemical mediators M. M. BROSNAHAN ...........................................................................................................545 Farriery for the foal: A review part 1: Basic trimming S. E. O’GRADY .....................................................................................................................553 Marketplace ..................................................................................................................560A-D $GYHUWLVHUV·,QGH[ .............................................................................................................510 Cover photo by Dr. Eleanor Green. c.c.001_I-II_EVE1020.indd001_I-II_EVE1020.indd 1 99/30/20/30/20 112:092:09 PM American Association of Equine veterinary education Equine Practitioners American Edition 4033 Iron Works Parkway Lexington, KY 40511 0$50#&3t70-6.&t/6.#&3 5&- r FAX (859) 233-1968 EMAIL [email protected] Editor (UK) Assistant Editors S. Love aaep.org T. S. Mair, BVSc, PhD, DEIM, DESTS, F. Andrews M.L. Macpherson To access our website, go to aaep.org, select DipECEIM, MRCVS D. Archer M.J. Martinelli LOGIN, then enter your email and password. If you F.T. Bain I.G. Mayhew have difficulty logging in or have forgotten your Editors (USA) A.R.S. Barr M. Mazan password, please call or email the office. N. A. White II, DVM A. Blikslager C.W. McIlwraith W. D. Wilson, MRCVS M. Bowen B. McKenzie AAEP Officers N. Cohen R. Moore David Frisbie, DVM, President Deputy Editors V. Coudry M. Oosterlinck Y. Elce A. Dart A. Parks Scott Hay, DVM, President-Elect P.R. Morresey J.-M. Denoix S. Puchalski Emma Read, DVM Vice President P.A. Wilkins T. Divers A.G. Raftery Lisa Metcalf, DVM, Treasurer P. Dixon C. Riggs Jeff Berk, VMD, Immediate Past President Management Group W. Duckett H. Schott D. Foley B. Dunkel J. Schumacher AAEP Staff T. S. Mair S. Dyson S. Semevelos David Foley, CAE, Executive Director N. A. White T. Fischer J. Slater D. Freeman B. Sponseller [email protected] W. D. Wilson T. Greet C. Sweeney Lori Rawls, Director of Finance & Operations J. L. N. Wood [email protected] R. Hanson H. Tremaine P. Harris K. Wareham Sally J. Baker, APR, Director of Marketing Management Board & Public RelationstTCBLFS!BBFQPSH M. Hillyer S. Weese A. R. S. Barr C. Scoggin M. Holmes R. Weller Keith Kleine, Director of Industry Relations (US Editor) [email protected] D. Foley N. A. White N. Hudson C. Yao D. Mountford S. White P. Johnson Nick Altwies, Director of Membership (Editor) (US Editor) [email protected] T. S. Mair W. D. Wilson P.T. Khambatta Ex-officio S. E. Palmer J. L. N. Wood (Chairman) Kevin Hinchman, Director of Information Technology J.-P. Lavoie J. Cooney [email protected] Karen Pautz, Director of Education Equine Veterinary Education is a refereed educational journal designed to keep the practicing veterinarian up to [email protected] date with developments in equine medicine and surgery. Submitted case reports are accompanied by invited reviews Sadie Boschert, Student Programs Coordinator of the subject (satellite articles) and clinical quizzes. Tutorial articles, both invited and submitted, provide in-depth [email protected] coverage of issues in equine practice. John Cooney, Publications Coordinator Equine Veterinary Education (American Edition ISSN 1525-8769) is published monthly by the American [email protected] Association of Equine Practitioners, an international membership organization of equine veterinarians. Office of Giulia Garcia, Communications Coordinator publication is 4033 Iron Works Parkway, Lexington, KY 40511. Periodicals Postage paid at Lexington, KY and [email protected] additional mailing office. POSTMASTER: Send address changes to: Equine Veterinary Education, 4033 Iron Works Parkway, Lexington, KY 40511. Megan Gray, Member Concierge [email protected] Communications regarding editorial matters should be addressed to: The Editor, Equine Veterinary Education, Dana Kirkland, Sponsorship & Advertising Mulberry House, 31 Market Street, Fordham, Ely, Cambridgeshire CB7 5LQ, UK. Telephone: 44 (0) 1638 720250, CoordinatortELJSLMBOE!BBFQPSH Fax: 44 (0) 1638 721868, Email: [email protected]. Katie McDaniel, EDCC Communication Manager All manuscript submissions for the journal should be submitted online at http://mc.manuscriptcentral.com/eve. Full [email protected] instructions and support are available on the site and a user ID and password can be obtained on the first visit. If you Deborah Miles, CMP, Trade Show Coordinator require assistance, click the Get Help Now link that appears at the top right of every ScholarOne Manuscripts page. [email protected] All subscription inquiries should be addressed to: Subscriptions Department, AAEP, 4033 Iron Works Parkway, Jayson Page, Office Manager Lexington, KY 40511, Telephone: (859) 233-0147, Email: [email protected]. Subscription rates: AAEP annual [email protected] membership dues include $40 for a subscription to Equine Veterinary Education. Other subscriptions at $151.80. Paul Ransdell, Senior Development Officer Single copies $37.50. [email protected] Canadian Subscriptions: Canada Post Corporation Number