Aztec Pet Hospital

Aztec Pet Hospital is a  veterinary medical facility, located in Harker Heights, TX. The professional and courteous staff at Aztec Pet Hospital seeks to provide the best possible medical care and dental care for their highly-valued patients. 

We are committed to promoting responsible pet ownership, preventative health care and health-related educational opportunities for our clients. Aztec Pet Hospital strives to offer excellence in veterinary care to Harker Heights and surrounding areas. 

Please take a moment to contact us today, to learn more about our veterinary practice and to find out more information about how Aztec Pet Hospital can serve the needs of you and your cherished pet.

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John's Staff Spotlight Photo Dec 2019_ed



 Dr. John H. Kuczek takes great pride in being a Killeen native and he returned to the area after graduating  from Texas Tech and Texas A&M College of Veterinary Medicine. He established a mobile large animal practice that he operated for 7 years.

   Wanting to broaden his experience he accepted a position on Fort Hood and spent 7 years as the veterinarian for the First Calvary Horse Detachment, the Fort Hood Veterinary Treatment Facility and for the Military Working Dogs.

  On 16 April 2016, Dr. Kuczek and his wife, Emily, assumed ownership of Aztec Pet Hospital. Dr. Kuczek immediately expanded services to include a wide range of surgeries and dental procedures. He is very passionate about internal medicine and critical care. He seeks out educational opportunities as well as investing in the latest technology to ensure our clients receive the highest quality of medicine possible right here at Aztec with the Doctors they know and trust.

   Dr. Kuczek enjoys driving his vintage tractor with his two sons. He also spends his free time fishing, cooking, watching science fiction movies, and he attempts to shorten the "honey-do" list at home.

Dr. Carolyn Leisz 2.jpg



We are proud to have Dr. Carolyn Leisz join our Aztec team. Originally from Miami, FL

Dr. Leisz studied at Ross University School of

Veterinary Medicine and did her clinical year at the University of Florida.


Since graduation she has mainly been working in high volume, high quality spay/neuter and community medicine. She enjoys being a vet because of the variability in the cases she sees and the many services she can provide for patients. She says,"We vets do the work of surgeons, dermatologists, radiologists, ophthalmologists, dentists, etc., which makes for an interesting caseload and ability to have follow-up with your patients."


Dr. Leisz enjoys spending her free time with her husband and two daughters. They also have an 11 year old American Bulldog named Mama, a 1 year old pug, Darth Vader and 2 cats, Apricot and Pickles.


She enjoys true crime podcasts, books and movies, being a foodie, outdoor recreation,

as well as a newfound interest in gardening.

She says, "I am not yet good at keeping plants

alive, but I'm learning." LOL

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