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Our Team




For further biographical information, click on each person's name below
Trevor Ames DVM, MS, DACVIM - Professor and Dean of College

Dr. Trevor Ames received his Doctor of Veterinary Medicine degree from Western College of Veterinary Medicine, University of Saskatchewan and Master’s Degrees from the University of Minnesota. Trevor was an intern and resident at the UMN, CVM from 1978-1981 and board certified Diplomate American College of Veterinary Internal Medicine in 1983. He is currently a full time administrator serving as the Dean of the College while still teaching some lectures on infectious diseases of cattle including respiratory diseases. Trevor enjoys spending time with family and traveling when not representing the College.

Dean Ames - dairy site
Gerard Cramer DVM, DVSc - Associate Professor

Dr. Gerard Cramer has spent his whole life finding ways to work with dairy cows. Prior to joining the University of Minnesota, Gerard spent time running a dairy farm, owning a foot health specific veterinary practice and getting both a Doctor of Veterinary Medicine and Doctor of Veterinary Science degree from the University of Guelph. Joining the faculty at the University of Minnesota in 2013, Gerard splits his time between educating veterinary and graduate students and doing foot health related research. Outside of work, to relax Gerard spends time with his wife and 2 kids and enjoys playing soccer and running long distances.

Dr. Cramer - dairy site
John Fetrow VMD, MBA, DABVP Dairy - Professor

Dr. John Fetrow grew up on a commercial poultry farm in Maryland, went to MIT for undergrad and then to veterinary school at the University of Pennsylvania. While doing his residency, he also completed an MBA at Penn’s Wharton School of Business. John has more than three decades of experience in on-farm dairy practice and academic work in dairy production medicine. John’s academic focus at the University of Minnesota is on the economics of operating decisions made on dairy farms, dairy production management, disease control, and drug use management on dairies. He serves a liaison for the affiliation between the College of Veterinary Medicine and Davis Family Diaries, the home of the college’s Dairy Education Center. Away from work, John enjoys a generally ordinary life with his wife. He has four remarkable grown daughters. He is a hobby beekeeper (3 hives) and when it is too cold to work outside enjoys making stained glass panels.

Dr. Fetrow - dairy site
Sandra Godden DVM, DVSc - Professor

Dr. Sandra Godden is a 1993 graduate of the Ontario Veterinary College, University of Guelph. After working for two years as an associate veterinarian in mixed practice in Eastern Ontario, she returned to complete a Doctor of Veterinary Science degree specializing in dairy production medicine. From 1998 to present she has been a member of the Department of Population Medicine, University of Minnesota where she is involved with professional student teaching, applied research and outreach activities in dairy production medicine. Major academic interests include applied research in mastitis control, colostrum and calf health management, Johne’s Disease control and transition cow management. Outside the CVM, Sandra is a volunteer and member for the international development organizations Heifer Project International and Veterinarians Without Borders U.S. She also enjoys working in her garden.

Dr. Godden - dairy stie
Tim Goldsmith DVM, MPH, DACVPM - Assistant Clinical Professor

Dr. Tim Goldsmith received his Doctor of Veterinary Medicine from the University of Minnesota in 2001. After working in private practice specializing in bovine production medicine for several years in MN, IA and WI he returned to the University of Minnesota completing a residency program in veterinary public health and preventive medicine. While doing his residency he also completed a Masters in Public Health and became a diplomate of the American College of Veterinary Preventive Medicine. Since 2008, Tim has worked as an Assistant Clinical Professor with the Veterinary Population Medicine Department focusing on beef production medicine and veterinary student teaching, as well as with the Center for Animal Health and Food Safety where he is currently Co-Director of the Veterinary Public Health and Preventative Medicine Residency program. Tim’s current research interests are continuity of business planning, judicious antimicrobial use, and systems approaches to animal production. Away from work, Tim enjoys spending time with his wife and 2 daughters, and helping at his family's farm in Southeast, MN.

Dr. Goldsmith - dairy stie
Erin Royster DVM, MS - Instructor

Dr. Royster graduated from the North Carolina State University College of Veterinary Medicine in 2011. She completed a Master of Science in Veterinary Medicine at the University of Minnesota College of Veterinary Medicine, with an emphasis in milk quality and udder health. Dr. Royster is currently an Instructor in Dairy Production Medicine at the University of Minnesota College of Veterinary Medicine. Her areas of interest for research, teaching and outreach include milking equipment evaluation, milking parlor performance, on-farm mastitis diagnostics, and mastitis control. In addition, Dr. Royster is the faculty advisor for the University of Minnesota Laboratory for Udder Health.

Dr. Royster (2) - dairy site
Ulrike (Riki) Sorge Dr. med. vet. MSc, PhD, DACVPM - Assistant Professor

Dr. Ulrike ‘Riki’ Sorge completed her veterinary education and a doctorate degree at the Free University of Berlin, Germany. She also holds an MSc and PhD degree in Epidemiology from the Ontario Veterinary College of the University of Guelph and is a diplomate of the American College of Veterinary Preventive Medicine. Since 2011, Riki has worked as Assistant Professor of Dairy Production Medicine at the College of Veterinary Medicine at the University of Minnesota. Her research interests include Johne’s disease, control/prevention of other diseases on conventional and organic dairy farms and stockmanship. In her spare time, she enjoys to travel and to play Polo.

Dr. Sorge - dairy site
Scott Wells DVM, PhD, DACVPM - Professor

Dr. Scott Wells received his DVM from Michigan State University and then worked for several years in a Wisconsin veterinary practice which was predominantly dairy. He later earned his PhD in veterinary epidemiology at the University of Minnesota, after which he served as the dairy leader in the National Animal Health Monitoring System (within the Centers for Epidemiology and Animal Health, USDA-APHIS-Veterinary Services) in Ft. Collins, CO. Scott has been a faculty member at the University of Minnesota since 1999 and is the Director of Academic Programs at the Center for Animal Health and Food Safety. His research interests are related to prevention and control of pathogens of cattle, including Mycobacterium paratuberculosis (Johne’s disease) and Mycobacterium bovis (bovine tuberculosis). He is board certified in the American College of Veterinary Preventive Medicine and is currently Co-Chair of the National Johne’s Working Group. Outside of work, Scott enjoys time with his wife and four almost grown children, raising a few market lambs, and various outdoor sporting activities.

Dr. Wells - dairy site


Dairy Education Center Staff

Jessica Yost - Dairy Education Coordinator

Jessica Yost is a graduate of Gustavus Adolphus College in Saint Peter, Minnesota. After teaching kindergarten four years, she now enjoys working part-time with the Dairy Group at the Dairy Education Center (DEC). Jessica's responsibilities as the Dairy Education Coordinator are to work with students, faculty and Davis Family Dairy managers to host students and continuing education groups in dorm and classroom facilities located on at the commercial dairy near Nicollet, MN. When not at the DEC, Jessica can be found running after her three young children, doing farm bookwork or scrapbooking.

Yost (2) - dairy site


Graduate Students

Whitney Knauer

PhD advisor - Sandra Godden
PhD Research - Investigating the application of feeding behavior, activity behavior and body temperature measures to predict morbidity in group-housed pre-weaned dairy calves

Kruthika Patel

PhD Advisor: Sandra Godden
PhD Research - Investigation of the Relationship between Bedding Bacteria Counts, Bedding Characteristics and Management Practices, and Udder Health and Milk Quality on Dairy Farms

Grant Stoddard

PhD Advisor - Gerard Cramer
PhD Research - Investigation of the effects of hoof trimming on dairy cow lameness and welfare


Past Residents

João Gabriel N. Moraes, DVM, MSc

Dairy Production Medicine Residency Program - graduated 2014
Animal Science Master's program - graduated 2013
MSc Advisors: Ricardo C. Chebel and Marcia I. Endres
Residency Advisors: Ricardo C. Chebel and Gerard Cramer
MSc research - Effects of intra-uterine infusion of lipopolysaccharide on the inflammatory response, endometrial gene expression, uterine health, and reproductive performance of dairy cows diagnosed with vaginal purulent discharge
Current position – PhD at Washington State University

Luis G. D. Mendonca, DVM, MSc

Dairy Production Medicine Residency Program - graduated June 2012
Veterinary Medicine Master's program - graduated 2012
MSc and Residency advisor - Ricardo C. Chebel
MSc research - Comparison of Holstein and Montbéliarde-sired Crossbred Dairy Cows during the Transition Period.
Current position - Assistant professor/extension specialist at Kansas State University.


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