Utah State University DigitalCommons@USU All Graduate Theses and Dissertations Graduate Studies 5-2019 Ruminal Protection and Intestinal Availability of Rumen-Protected Methionine and Lysine in Lactating Dairy Cows Sara Menchu Utah State University Follow this and additional works at: https://digitalcommons.usu.edu/etd Part of the Dairy Science Commons Recommended Citation Menchu, Sara, "Ruminal Protection and Intestinal Availability of Rumen-Protected Methionine and Lysine in Lactating Dairy Cows" (2019). All Graduate Theses and Dissertations. 7451. https://digitalcommons.usu.edu/etd/7451 This Thesis is brought to you for free and open access by the Graduate Studies at DigitalCommons@USU. It has been accepted for inclusion in All Graduate Theses and Dissertations by an authorized administrator of DigitalCommons@USU. For more information, please contact
[email protected]. RUMINAL PROTECTION AND INTESTINAL AVAILABILITY OF RUMEN- PROTECTED METHIONINE AND LYSINE IN LACTATING DAIRY COWS by Sara Menchu A thesis submitted in partial fulfillment of requirements for the degree of MASTER OF SCIENCE in Animal, Dairy, and Veterinary Sciences Approved: Jeffery O. Hall, D.V.M., Ph.D. Jong-Su Eun, Ph.D. Major Professor Committee Member Kerry A. Rood, M.S., D.V.M., M.P.H. Richard S. Inouye, Ph.D. Committee Member Vice Provost for Graduate Studies UTAH STATE UNIVERSITY Logan, Utah 2019 Copyright © Sara Menchu 2019 All Rights Reserved iii ABSTRACT Ruminal Protection and Intestinal Availability of Rumen-Protected Methionine and Lysine in Lactating Dairy Cows by Sara S. Menchu, Master of Science Utah State University, 2019 Major Professor: Dr. Jeffery O. Hall Department: Animal, Dairy, and Veterinary Sciences Rumen protected Methionine (MET) and Lysine (LYS) are critical for milk protein synthesis in dairy cows.