Southwest Texas Veterinary Medical Center


Tracy Fant Colvin, DVM

Dr. Colvin grew up in Southeast Texas.  Her childhood pets included dogs, cats, rabbits, turtles, fish, a hamster and anything else she could talk her mother into harboring in her bedroom including an ant farm.  She cleaned stalls and fed horses, cattle and goats at a boarding stable during college to help pay for her education.  Since 2002, Dr. Colvin and her husband have called Uvalde home.

Dr. Colvin attended Texas A&M University where she earned her Bachelor of Science degree in Biomedical Science and Animal Science in 1992 and Doctor of Veterinary Medicine degree in 1998.

Dr. Colvin served on the executive board for Texas Veterinary Medical Association (TVMA) from 2006-2015 and as TVMA President in 2014.  She is a member of the American Veterinary Medical Association,  American Association of Equine Practitioners and Texas Equine Veterinary Association (TEVA).  She currently volunteers as the Horse Show Superintendent for the Uvalde County Junior Livestock Show and as a Director for the Uvalde Youth Rodeo Club.   Dr. Colvin recently completed her Fear Free Certification and enjoys promoting considerate approaches and gentle control techniques for both small and large animals to provide less stressful care for her patients. Dr. Colvin also recently completed the Mackinaw Dells Applied Whole Horse Hoof-Care Program to become certified as a hoof care provider.

Dr. Colvin enjoys working with a wide variety of species including dogs, cats, horses, goats, pigs, rabbits, guinea pigs, chickens and ferrets.   Her hobbies include horseback riding, playing with horses at liberty, photography and reading.


Jenny Russell, DVM, MPH

Dr. Russell has a particular fondness for cats and shares her life and home with “The Stink”, a nakkie Sphynx cat, and “Pico Sir”, the slightly naughty JRT who accompanies her to work most days.

She believes in education and remaining up to date with current veterinary medical knowledge, techniques, and treatments. She recently served as President of the Texas Academy of Veterinary Practice whose members voluntarily agreed to complete at least 50 hours of continuing education each year. She also maintains membership with The Veterinary Information Network (VIN). She received a Bachelor of Science in Animal Science in 1994 from Texas Tech University, a Bachelor of Veterinary Science in 1995 and Doctor of Veterinary Medicine in 1998, both from Texas A&M University and completed her Masters in Public Health Epidemiology from University of Texas, Health Science Center in 2013.

Dr. Russell is a member of American Veterinary Medical Association (AVMA), Texas Veterinary Medical (TVMA), and the Southwest Texas Veterinary Medical Association (STVMA). She serves on Paraprofessional and Practice Management Committees for Texas Veterinary Medical Association, previously serving on the Public Health and Disaster Preparedness Committee.
Her professional interests are centered around public health and small animal medicine & surgery. In 2015, in order to help SWTVMC continue its tradition of caring for orphaned and injured wildlife, she became licensed to rehabilitate native Texas wildlife.

Dr. Russell enjoys team building and strives for the practice to continually invest and develop its members. Her most current efforts are in making our practice as comfortable to the patients as possible with Fear Free techniques. Fear Free signifies a transformative approach to veterinary care that ensures a patient’s emotional well-being is given the same level of attention as their physical well-being. Fear Free helps us make the veterinary visit more pleasant for both our patients and clients.

Her hobbies include continuing education, physical fitness, bible study, and gardening. Dr. Russell is a member of First Baptist Church Uvalde, serves as Uvalde County’s Local Rabies Control Authority and is a sustaining member of The Junior League of San Antonio.


Lauren D. Tully, DVM

Dr. Tully was born and raised in Brooklyn, NY. She tried to satisfy her early love of animals by feeding the neighborhood stray cats and starting a dog walking business. Later the family’s move to a smaller city allowed her to work in horse stables and volunteer at a small animal hospital.

Dr. Tully earned her Bachelor of Science degree and her DVM degree at Cornell University. After graduation, she completed an internship in Equine Medicine at a private practice in Charlottesville, Virginia. She then went on to complete a residency in small and large animal anesthesia at the Ontario Veterinary College in Canada.

While doing relief work at an animal emergency clinic, Dr. Tully discovered a passion for emergency medicine and surgery and has worked in that field for 18 years. After years of complaining about the long winters in upstate New York, she and her family finally decided to move. They fell in love with Texas while traveling cross country and settled here.

Just prior to coming to SWTVMC, Dr. Tully worked as a senior emergency clinician at The Emergency Pet Clinic of San Antonio. Although she still enjoyed the challenges and rewards of emergency medicine, the overnight hours and commute from her home in Sabinal were becoming less desirable. She was thrilled to get the opportunity to become part of the team here at SWTVMC.

Dr. Tully lives in Sabinal with her husband, 2 children, dog, cat, 2 goats, 3 horses, and has a small herd of cattle. She is a member of the AVMA, TVMA, and the Veterinary Emergency and Critical Care Society. She volunteers as an assistant coach with the Uvalde Youth Soccer Club. She looks forward to meeting and serving the medical needs of the pets of the area and their families.



Mary Verstuyft – Practice Coordinator, CVA 3

Mary Verstuyft was born in Texas City and raised in Leakey. Mary now resides in Batesville with her husband, Nathan, of Knippa, and their two daughters, Claire and Margaret.

Mary began working at Southwest Texas Veterinary Medical Center in February 2012 as an animal care attendant. In March of 2016, she became one of our lead technicians. Mary completed her Certified Veterinary Assistant Level 3 in 2020. It is the policy of TVMA that all certified veterinary assistants must progress through each certification step in sequence, that is, all CVAs must certify first at Level I, Level II and then Level III in sequence. Texas has only 75 Certified CVA III technicians, Mary has become the 76th. A HUGE ACCOMPLISHMENT! Congratulations Mary!

Mary’s hobbies include fishing, hunting, helping her husband on the farm, and spending quality time with her 5 furry canines.



Thomas Crow – AEVA

Thomas Crow was born and raised in Texas and graduated from Bracketville High School.  Thomas attended Southwest Texas Junior College where he was a member of their prestigious rodeo team.

Thomas joined the SWTVMC team in January of 2002.  His passion for and lifelong experience with horses made him an excellent candidate for our equine technician position.

He enjoys attending continuing education seminars and learning more about equine medicine and surgery.  In 2015 Thomas traveled to Ames, Iowa and received his certificate in Coggins lab training given by the National Veterinary Services Laboratories.    In 2018, Thomas completed an intensive on line training course to become a Certified Equine Veterinary Assistant.  In 2019 Thomas’s continuing education centered around hoof care and hoof pathology.  He completed hands on training and coursework to earn his Applied Whole Horse Hoof Care Certification.

Thomas’s hobbies include team roping and competing in ranch rodeos. He enjoys working with horses and spending time with his wife, Teresa also of Uvalde, and their three beautiful children Briana, Carter, and Trevor.

Barbara Rodriguez – CVA 2

Barbara Rodriguez was born in Los Angeles, California and grew up in Hondo, Texas and graduated from College of Texas Careers in San Antonio with a certification as a nationally registered medical assistant.  She currently resides in Sabinal, TX.

Barbara worked as a medical assistant at Community Health Development for 16 years.  She is passionate about leaning.  She brought years of medical experience and her kind caring nature with her when she joined SWTVMC as a receptionist in July of 2015.    She has already earned her Certified Veterinary Assistant Level 2 training certificate.  In 2018 Barbara traveled to Ames, Iowa and received her certificate in Coggins lab training given by the National Veterinary Services Laboratories. Barbara completed Fear Free Certification in order to help our practice move towards vet visits with less stress fear and anxiety. In 2019 she was certified for Cervid Chronic Wasting Disease Sample Collection.



Maribelle Aguilar

Maribelle was born in raised in Uvalde and worked in childcare for 15 years before joining the Southwest Texas Vet team as an animal care attendant.

Maribelle enjoys helping others and takes pride in the cleanliness and comfort of the hospital.

Maribelle enjoys spending free time with her husband of 26 years, three children and five grandchildren. She enjoys a good Zumba workout, reading, fishing, camping and has a talent and love of decorating for parties.  Maribelle completed Animal Care Technology Kennel Assistant Certification in 2017.   Maribelle completed her Fear Free Certification.  The Fear Free program helps us make each visit as stress-free as possible for all of our patients.



Becky Garza – CVA 2

Becky Garza was born and raised in Uvalde. She graduated from Uvalde High School, where she participated in soccer and powerlifting. She attended Southwest Texas Junior College where she studied Criminal Justice.  She completed her Fear Free training in 2019 She completed her Animal Care Technology Receptionist Certification in 2017. A stress-free visit starts in our waiting room.  We appreciate all she does to make our clients and patients as comfortable as possible.

After spending the day with all of the animals at work, Becky goes home to her 3-year-old fur baby Petey, who is a Schnauzer mix. He is super friendly, loves kids and jumps for joy anytime he gets a little attention. He likes to fetch his toys and run around the yard.

Becky is the youngest of 5 siblings, three brothers, and a sister. She enjoys spending her free time with her family BBQing, playing volleyball, singing karaoke, and watching football. She also likes spending time at the rivers or beaches in Corpus Christi with her boyfriend Joey.

Becky joined our team as a Client Service Coordinator in December 2016  and is currently transitioning to a veterinary technician position. She loves working with and helping people along with their animals.


Molly Lowe – CVA 2

Molly was born and raised in Boerne, Texas. Molly attended Tarleton State University and graduated in May 2017 with her Bachelor of Science in Animal Production. She has always had a strong passion for animals. Molly has been active in animal rescue, care, and rehabilitation since she was 10 years old.  She volunteers for Flights to Furever and Loving Texas pet Assistance. Molly complete her Certified Veterinary Assistant Level 2 in 2018.  In 2019 she was certified for Cervid Chronic Wasting Disease Sample Collection. Molly is currently attending Veterinary Technology School at Cedar Valley College earning her Veterinary Technology degree to become a Licensed Veterinary Technician. Molly has also completed her Fear Free Certification.

When not at work, Molly enjoys spending time bottle feeding orphan kittens. She also enjoys being at home with her husband, Zach, and their cats and dogs. Molly also enjoys photography and hiking.


Mary Stapp

Mary joined our team June of 2020 as a Client Service Coordinator and earned her Animal Care Technology Receptionist Certification. Mary also completed her Fear Free Certification.  The Fear Free program helps us make each visit as stress-free as possible for all of our patients.

Mary grew up in Texas, Louisiana, Kansas and New Mexico. She was known to bring home animals from all regions; from swamp critters to desert animals, until her mom would tell her “no more critters”.

Mary has an eclectic background and comes to us with a degree in Communications & Design from University of Phoenix.  Her hobbies include graphic design, reading, traveling, gardening and loving all animals that come her way; especially her 15 year old dog “Buster” , 3 kitties “Cupcake”, “Lil’ Toot” and “Da Vinci” and 2 fish “Herman Munster” and “Polly”.




Melissa Bingham

Melissa joined our team March of 2021 as a Client Service Coordinator and completed her Animal Care Technology Receptionist Certification.
Melissa grew up in Uvalde and surrounding areas. Her youth was spent working on ranches, raising sheep and
goats with her parents and two younger sisters. Melissa graduated from Nueces Canyon High School in 1999,
she went on to earn an associates degree in Applied Science of Wildlife Management from
Southwest Texas Junior College. Melissa completed her Fear Free Certification.  The Fear Free program helps us make each visit as stress-free as possible for all of our patients. Melissa’s spare time consists of enjoying the outdoors with her family and reading.






Maryann Arreguin

Maryann was born and raised in Arlington, Texas.  She joined Southwest Texas Vet team as an Animal Care Attendant, and she is enrolled at Cedar Valley College studying for her Small Animal Technician Certification. Maryann has earned her Fear Free certification in 2022. Maryann has become our Grooming Technician she went to the Grooming Academy of Texas and earned Professional Canine Stylist, The American Kennel Club S.A.F.E Groomer certificate, Penn Foster Career School for Pet Grooming Certificate, Maryann is also a Intel Analyst in the Army National Guard and has been active duty since 2016.

Maryann has 2 rabbits “Bugs” and “Lola”. She also has 2 dogs “Chalino” and “Jaquie”. She loves to be outside with her dogs.





Kassandra Lopez, LVT

Kassandra was born in Uvalde and raised in Crystal City, Texas. She joined SWTVMC as a Licensed Veterinarian Technician in May of 2021. She attended Southwest Texas Junior College and earned her Associate’s degree, then Kassandra continued her education at Texas A&M Kingsville and earned her Bachelor’s degree in Agriculture Veterinary Technology. Kassandra completed her Fear Free Certification in 2018. The Fear Free program helps us make each visit as stress-free as possible for all of our patients.

Her hobbies include, tennis, playing video games, and listening to music. Kassandra is very family oriented and she enjoys spending time with her dog “Coconut”.




Jenny Heard

Jenny was born and raised in Lake Charles, Louisiana. She joined our team in 2014 and stayed until 2016 as Client Service Coordinator. She then moved to Shreveport, Louisiana with her family where she continued her career as Veterinary Customer Service Specialist from 2016 to 2021. She returned to Uvalde in September of 2021 where we welcome her back at SWTVMC and she is resuming her career with us as a Client Service Coordinator. Welcome back Jenny! She is currently working on her Animal Care Technology Receptionist Certification.

Jenny went to McNeese State University and Louisiana State University where she studied Communications. In 2004 Jenny married Brad Heard and they have two beautiful kids Madison 15 and Remington 12. They have a fiery Dachshund named Tabasco and sweet blue healer / coonhound mix named Blue. She enjoys spending time with her family and traveling.