Meet Our Staff
John D. Clader , DVM
Dr. Clader earned his Doctorate of Veterinary Medicine from Texas A&M University in 1973. He founded Chaparral Veterinary Center in 1984. He is the past president of Southwest Texas Veterinary Medical Association and the Texas Academy of Veterinary Practice. He has also served on the AVMA Council of Education and the Texas State Board of Veterinary Medical Examiners. Dr. Clader is also an Iditarod Sled Dog Race Veterinarian and a member of Christian Veterinary Mission. Dr. Clader has special interests in soft tissue surgery and orthopedic surgery.
Jason W. Trial, DVM
Dr. Trial graduated cum laude from Texas A&M University with a Bachelor of Science in Wildlife and Fisheries Sciences in 1997. He also received a Bachelor of Science in Veterinary Science from Texas A&M University in 1998. He completed his Doctorate of Veterinary Medicine in 2001 from Texas A&M University College of Veterinary Medicine. Dr. Trial joined Chaparral Veterinary Center as an associate following graduation in 2001. He joined Dr. John D. Clader as partner in 2009. Dr. Trial has special interests in internal medicine and small animal/equine dentistry. Dr. Trial is married to Kristen Breeden Trial and has three daughters – Jordan, Jayde and Jillian.
Stephanie M. Collins, DVM
Dr. Collins earned a bachelor’s degree in Animal Science from McNeese State University in Lake Charles, LA in 2000. After moving to Texas she pursued a Master’s degree in Reproductive Physiology followed by a Doctorate of Veterinary Medicine at Texas A&M University, completing these degrees in 2005 and 2007. Dr. Collins joined Chaparral Veterinary Center in 2013, and moved to Jourdanton with her husband Jared and son Jaxon. Dr. Collins has special interest in diagnostic ultrasound of cats, dogs, and horses.
Kayla Patterson, DVM
Kayla Patterson was born in Corpus Christi, moved to Louisville, KY and then on to a small town in southern Pennsylvania, before returning to Boerne, TX for high school. Dr. Patterson decided at 5 years old that she wanted to become a veterinarian and that she would be attending Texas A&M University for both undergrad and veterinary school, and maintained those dreams with each move. In August 2008 she started at A&M with a degree in Animal Science, with which she graduated in May 2012. Dr. Patterson started vet school in August 2012 and graduated May 11 with her DVM. She has a 10 year old Boxer named Gracie, a 5 year old miniature pig named Bacon, and her brother's 6 year old Boxer, Dudley, who she has cared for since he was a puppy.