COLLEYVILLE ANIMAL CLINIC - Key Persons


Dr. Cassandra Erickson

Job Titles:
  • Chief of Staff
I am a Texas native, born and raised in Plains, Texas. I have worked in the veterinary field since I was in high school, where I started out as a kennel tech. I knew at a very early age that this was what I wanted to do for the rest of my life. I attended Texas A&M University where I received my Bachelor of Science degree in Biomedical Science. After graduating, I attended Western University of Health Sciences in California where I received my Doctor of Veterinary Medicine degree in 2008. I completed a rotating internship in Albuquerque, New Mexico at VCA Vet Care Animal hospital where I worked from 2008-2009 and gained experience in Emergency Medicine, Internal Medicine, Ultrasonography, Surgery, Oncology, and Dentistry. This is where my passion started for Emergency Medicine, Ultrasound and Surgery. I then moved back to Texas and worked at VCA Beltline East Animal Hospital seeing emergency cases and being on call for 3 years. I was promoted to Assistant Medical Director at VCA Lakewood Animal Hospital for one year, and then was promoted to Medical Director at VCA Advanced Care Animal Hospital. I was promoted to Area Medical director for the Southwest region of VCA in 2018 while I was still the Medical Director and practicing veterinarian at VCA Advanced Care Animal Hospital. I am now ready to start a new chapter in my career and join the amazing family team here at Colleyville Animal Clinic.

John B Blick

Job Titles:
  • Veterinarian
I grew up the 7th of 9 kids on the family farm near Wichita, KS. I enjoyed all the farm animals and pets growing up, and decided to pursue veterinary medicine when I attended KSU. After graduating with my doctorate in veterinary medicine, I moved to TX for more opportunities. I wanted to own my own practice, and became the co-owner of Colleyville Animal Clinic in November of 1989. I'm between pets at the moment, but enjoying my "grand-pets": Juliet, a King Charles Cavalier weighing only 9lbs; James, the orange tabby with half a tail; and Dirk, the golden retriever that loves to play ball (just like his namesake Dirk Nowitsky!).

LaLa Keim

Job Titles:
  • Veterinarian

Sara Nichols

Job Titles:
  • Veterinarian
I am originally from the DFW area and knew from age 9 that I wanted to be a veterinarian. I attended the University of Texas at Dallas where I received my Bachelor of Science degree in Biology, and I then graduated with my DVM from Texas A&M University College of Veterinary Medicine in 2014.

Shayla Holland

Job Titles:
  • Veterinarian
I am from Lake Dallas, Texas in Denton County and am happy to be back in the DFW area. From a very early age, I always wanted to be around animals. My passion for animals and love of the puzzle of medicine led to my pursuit of becoming a veterinarian. My high school years were spent raising livestock in FFA and shadowing at a mixed animal veterinary hospital in Argyle, Texas. I followed my interests to study animal science at Iowa State University in Ames, Iowa. While there, I became involved in multiple research projects, was a member of the collegiate livestock judging team, and participated in study abroad trips focused on wildlife, livestock, sustainability, and agriculture to Uganda, Guatemala, and Italy. I graduated Summa Cum Laude with Bachelors of Science degrees in Animal Science and International Agriculture. After graduating from Iowa State in 2020, I returned to Texas to attend Texas A&M University College of Veterinary Medicine for my Doctor of Veterinary Medicine. In my four years in Aggieland, I was involved in multiple veterinary student organizations and was fortunate to be able to participate in a wildlife conservation medicine study abroad to South Africa. I graduated Magna Cum Laude with my Doctor of Veterinary Medicine in 2024. My veterinary interests include internal medicine, dermatology, diagnostic imaging, preventative medicine, pain management, and senior care. I share my home with my 13-year-old German Shepherd, Luke, and my 2-year-old German Shepherd, Eir. There will always be a special place in my heart for large breed, working dogs and especially German Shepherds. In my free time, I enjoy spending time with friends and family, walking my dogs, traveling, reading, and sewing. I am grateful and excited to be here at Colleyville Animal Clinic working with this great team of veterinary professionals! I look forward to helping clients keep their pets happy and healthy for years to come!