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903-465-0777 hayesoffice@att.net

About Us

Experienced Veterinarians with a passion for horses and helping.

Serving Texas and Oklahoma Families Since 1985

Our mission at Hayes Equine Veterinary Services is to provide quality medicine, veterinary care and service 24/7. Whether in the field or in the clinic, from conception through retirement, our goal is to provide personalized care for your horse.

Started in 1985, by Dr. Katie Hayes as a mobile equine practice out of her house, Hayes Equine Veterinary Services has provided veterinary service 24/7 to the horses and horse owners of Texoma for over 30 years. The original Texas clinic at 6544 FM 1753, Denison, TX is located on Dr. Hayes’ home property, where Dr. Hayes provides 24 hour veterinary care. The clinic focuses on wellness programs, emergencies, sick and hurt horses, intensive care, dentistry, reproductive services, and lameness.

Our staff is dedicated to provide quality service and veterinary care for you and your horse.

Our Promise to You

Meet the staff that will go above and beyond to care for you and your friend.

Dr. Katie Hayes DVM

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Dr. Hayes graduated from Texas A&M and has been practicing equine medicine for 40 years. She worked for Sherwood Animal Clinic in Beaumont, TX and for Dr. Dick Shepherd as a resident vet on his TB breeding farm in Aubrey, TX before starting her own equine practice in Denison in 1985, and Hayes Equine Oklahoma in 2007. 

An active member of Equine Veterinary Associations, Dr. Hayes has served on committees and boards of the Texas Veterinary Medical Association, Texas Equine Veterinary Association, and past president of the North Texas Equine Practitioners Association. Dr. Hayes has also served as a board member of the handicap riding association, Hanna’s Horseshoes of Hope, and for Divine Equine Therapeutic Riding Center.

Dr. Hayes believes in giving back to the local horse community. She donates her time, money and services to local horse organizations, shows, rodeos, and horse rescue groups. She also actively participates in equine presentations for the local Extension Services, 4H, and Horse Clubs. Always encouraging and mentoring future horse vets, Dr. Hayes offers high school and college students with pre-vet interest an opportunity to shadow and veterinary students to do externships at her practice. Her interests are Repro, Foals, Dentistry, and Racehorses.

In her spare time, Dr. Hayes rides Dressage, breeds Thoroughbred racehorses, and travels. 

Dr. Meghan Mendoza DVM

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Dr. Meghan Mendoza grew up in a small town north of St. Paul, Minnesota where she spent her time showing horses in 4H and the local saddle club association. After high school, Dr. Meghan attended Drake University, where she graduated Cum Laude with an English major and a minor in biology. She spent a year in China where she taught English, and then attended the University of Minnesota College of Veterinary Medicine, where she received her DVM in 2013.

After doing a six-month internship in Kentucky, Dr. Meghan moved to Texas to start working at Hayes Equine Veterinary Services. Her special interests include ophthalmology, lameness, dentistry, and surgery.

In her spare time, Dr. Mendoza enjoys breeding, training, and showing western pleasure horses with AQHA. She also has an interest in mounted archery, an up-and-coming sport. Dr. Mendoza also enjoys travelling the world, going places like India, Morocco, Southeast Asia, and Europe. 

Dianne Hildebrand

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Dianne has been working for Hayes Equine for over twenty years. She started out as a veterinary assistant, worked in the office, went back to assisting on the truck, and now serves in the office once again. A passionate animal lover, Dianne has always been surrounded by animals. She currently has 11 cats, one dog, a horse and a donkey, and two goats. She misses her beloved horse, Baby, terribly. When she is not working, Dianne enjoys visiting her three children and five grandchildren, spoiling her cats, and watching movies.

Betty Ann Sullivan

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Betty Ann grew up in southern California riding horses and working at her parents feed store. After moving to Oklahoma and then to Texas, Betty Ann has been with Hayes Equine as a secretary for over ten years. A lover of Appaloosa horses, Betty Ann spends her time breeding and raising them for many events, as well as improving her home and ranch.

Kate Jacobs

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Kate joined the Hayes Equine team in January of 2014. Kate graduated with a bachelors in Animal Science from Texas A&M, Commerce. She has ridden and owned horses most of her life. In her spare time, Kate currently enjoys pleasure riding, running, and working out.

Emily Brakebill

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Emily joined Hayes Equine in October of 2018. She grew up on the eastern shore of Maryland, but has been a Texas resident for the last five years. She began riding horses at the age of seven, which turned into a lifelong love and passion. She enjoys working with off the track Thoroughbreds in their transitions into new careers post track. Emily is currently going back to school to become a certified veterinary technician and is excited to be a part of the Hayes Equine family.

Our Newsletter

Kick back and have a cup of coffee while you read our latest news and updates!

Visit Us

6544 FM 1753
Denison, TX 75021

Call Us

Phone: (903) 465-0777
Fax: (903) 464-0071

Email Us

hayesoffice@att.net