Ada Veterinarians

VeterinarianDr. Sam Bryant, DVM

Dr. Sam Bryant is a 2013 graduate of the Oklahoma State University College of Veterinary Medicine. Born and raised in southern Pontotoc County on a small horse farm, Dr. Bryant graduated from East Central University prior to veterinary school. He has been practicing at the Ada Veterinary Clinic since 2014. Dr. Bryant strives to provide quality progressive veterinary care to the livestock and pet owners of the Ada area. Dr. Bryant’s professional interests include beef cattle production medicine, bovine and equine reproduction, lameness and equine dentistry. When not in the clinic Dr. Bryant enjoys spending time with his wife Hayley and his children Matthew and Hannah. He also enjoys hunting, fishing and Oklahoma State football.

VeterinarianDr. Ashley Durham, DVM

Dr. Ashley Durham, DVM is a 2011 graduate of the Auburn University College of Veterinary Medicine. She joined the Ada Veterinary Clinic in 2011 and since then she has focused on small animal care. Dr. Durham is originally from southeastern Kentucky where she was raised on a tobacco/cattle farm. Dr. Durham is an avid fitness, travel and basketball enthusiast but her passion continues to be the care and health of her patients. She's a member of the American Veterinary Medical Association and the Oklahoma Veterinary Medical Association. Dr. Durham focuses on small animal care but all species are welcome.


VeterinarianDr. Jacob Parkison, DVM

Dr. Jacob Parkison is a 2019 graduate of the University of Tennessee College of Veterinary Medicine.  Dr. Parkison is originally from southeastern Tennessee where he was raised on a small beef farm.  Dr. Parkison is excited to be new to the community and hopes to provide quality medicine to the livestock and pet owners he will be serving. Dr. Parkison's professional interests include beef production, equine general care, and bovine/equine reproduction.  When Dr. Parkison isn’t at the clinic he enjoys running, hiking, fishing, hunting, and spending time with family and friends. 

VeterinarianDr. Ron Thomason, DVM

Dr. Ron Thomason is a 1983 Oklahoma State University grad and he started to work at the Ada Veterinary Clinic in December of 1984. He lives in Ada with his wife Nance who works for East Central University.


VeterinarianDr. Calvin White, DVM

Dr. White grew up in Poplarville, Mississippi raising all types of animals, showing cattle, showing horses, roping, hunting and fishing. He went to undergrad at Pearl River Jr. college, then Mississippi State and graduating from Auburn College of Veterinary Medicine in 1977. He first practiced In Coalgate with Dr. Paul Winsor and Dr. Cliff McDonal for four years. He purchased half interest in the Ada Veterinary Clinic in 1981. He and Dr. Don Connally were partners for 26 years. He bought out Dr. Connally's half of the practice in 2007 and remained sole owner until January 2017 when he sold the practice to Dr. Durham and Dr. Bryant. He enjoys caring for all species of animals but spends most of his time in surgery. He has been the past President of the Oklahoma Veterinary Association and was the 2012 Veterinarian of the Year. He has been the past President of the Oklahoma Quarter Horse Association and is currently a National Director of the American Quarter Horse Association. He has a son, Tyler that is a lawyer in Ft. Worth with his wife Christen and daughter Georgiana and a daughter Sara that is a Senior Engineering Technician with Penn Virginia Oil Co. in Houston with her husband Kyle. He enjoys hunting, fishing, golf and horse related events.