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Oklahoma State University
Center For Veterinary Health Sciences

Healthy Animals - Healthy People

Meet the Staff


Paul DeMars, DVM, DABVP

paul demars

Dr. Paul DeMars was born and raised in Stafford Springs, Conn. After graduating from the University of Connecticut with a bachelor's degree in Pathobiology, he moved to Stillwater, Okla., to pursue his training in veterinary medicine. In school he met and married his classmate, Anna Coffin. After graduation in 1994 they moved to Concord, N.H. where they both worked in primary care veterinary practices. Three years later they moved back to Oklahoma and bought Guthrie Pet Hospital in Guthrie, Okla. After working together for two years, DeMars returned to OSU where he has worked in the Community Practice service since 1999. 

In 2001, DeMars became board certified in the American Board of Veterinary Practitioners, Canine and Feline Practice.  His areas of interest include wellness medicine, ear disease, geriatric medicine, behavioral medicine, practice management and communication.

Lara Sypniewski, DVM, DABVP, CVA, CCRP

lara sypniewski

Dr. Sypniewski is the Henthorne Clinical Professor of Small Animal Medicine at Oklahoma State University. A 1998 graduate of Purdue University School of Veterinary Medicine, Sypniewski has focused her career on providing an integrative approach to wellness. As a trained acupuncturist and canine rehabilitation practitioner, Sypniewski provides a balanced approach to encourage whole animal wellness throughout each stage of life. Her hope is to improve the quality of life of her patients by effectively managing pain and improving posture, balance and symmetry for lifelong good health.  In addition to her clinical responsibilities, Sypniewski’s collaborative research is focused on pain relief and wound treatment options for exotic species, with a long term goal of determining the effectiveness of opioids in avian and exotic mammals. 

Sypniewski is married to a wonderful man, Gary, and has the cutest “tween” son, Evan. She adores poodles (she has three—one of each size: Cooper, Leo, and Galt) and loves her elderly male cat, Jack. In her free time, she enjoys watching her son’s baseball or basketball games, walking her herd of dogs, and doing yoga.

Veterinary Technicians

Robin Hensley, RVT

robin hensley

Robin grew up in the Oklahoma City area and has been working with animals since she was a teenager. She graduated from Oklahoma State University in 1996 with a bachelor's in zoology. She later pursued a degree in Veterinary Technology at Oklahoma State University-OKC and graduated in 2001. She moved to Stillwater in 2004 and started working for the OSU Veterinary Teaching Hospital.

She has two children, a girl and a boy, and 10 four-legged children, three dogs and seven cats. She loves spending time with her family and pets. She also enjoys spending time outside and doing Zumba.

Kristal McKenzie, RVT

kristal mckenzie

Kristal worked as a veterinary assistant in high school. She earned a AAS in veterinary technology from Colby Community College in 2007. During college and after graduating, she worked at a mixed animal private practice. While in Kansas, Kristal worked as a large animal technician and learned that she enjoys working with a mixture of animals. She started in the SA CCU department in April 2010 and recently joined Community Practice.

Kristal has four dogs (two of them being rescues), a cat and a hedgehog at home. She enjoys being outdoors (hunting, fishing, camping, running) and spending time with family and friends.