Dr. Jill Mixer

Dr. Jill Mixer was born in Tulsa, OK and moved to Oklahoma City as a young girl. She attended John Marshall High School and was active in 4-H, showing horses, playing on her high school tennis team and working at Britton Road Veterinary Hospital, even through college. She attended Oklahoma State University graduating from veterinary school in 1985 and moved to New Hampshire for 3 years to practice at Rockingham Park in Salem, NH. After spending the winter of 1987 at Gulfstream Park in Miami, FL, she moved back to OK in 1988 with her twin sons, Duke and Ryan and started her own practice at Remington Park when it opened in 1988. Her primary interests are lameness in racehorses and performance horses. She has another child, Sara, who also works at Waterloo Animal Hospital, which was opened in February of 2016. Her hobbies include spending time with family, reading, traveling and being on the farm with her horses, particularly the foals.


Dr. Joanna Brackett

Dr. Joanna Brackett was born and raised near Lubbock, Texas. She moved to Oklahoma in 2005 to attend Oklahoma State University, and majored in Animal Science. In 2015 she graduated from the College of Veterinary Medicine at Oklahoma State University. For the first two and a half years of practice, Dr. Brackett worked as a mixed animal veterinarian, in rural central Oklahoma. In 2016 she received her license to offer chiropractic services to her patients large and small. Over the past year, she has been providing relief services for veterinary clinics all over the state of Oklahoma. During this time, she began working for Dr. Mixer at Waterloo Animal Hospital and quickly grew to love the patients and clients here. She is now the full time associate veterinarian at Waterloo Animal Hospital.

Dr. Brackett is without a doubt, a crazy dog person. She currently has 4 of her own dogs, 2 cats and 2 horses. In her free time she enjoys spending time with friends and family, volunteering her time for public service and relaxing with her pets. Her favorite aspect of veterinary medicine is working on a wide range of animals which keeps her well rounded and continually learning new practices. She is also passionate about patient care and believes compassion and empathy goes a long way in helping sick pets recover.


Rachel Millar

My name is Rachel Millar and animals, both large and small, have been a constant fixture in my life since birth. Both my father, and grandmother, are veterinarians;specializing in equine. My family has owned and operated a large registered Brangus cattle and registered American Quarter Horse operation in central Oklahoma for the better part of thirty years. Although I have primary been around large animals most of my life, I do love working with the small and furry. I have also been known to bring a few of the small and furry home from time to time. I am blessed to have a beautiful three-year-old daughter, Kynlie, who certainly shares the family affinity for all of God’s creatures. Veterinary medicine is both a fascinating and rewarding field and I am so thankful to be a part of it every single day.


Pat Russell

I was raised in Hawarden, Iowa. In 1981 I took the big jump and moved to Oklahoma City, where I met my husband Tony and started a life and family. I have 2 stepdaughters and a daughter of my own. We now have a total of 9 grandchildren. My hobbies are gardening, canning, working in the yard and sewing. We have 1 dog named “Charlie” a chocolate lab, 2 cats “Spazy” and “Ted”, and several chickens which I dearly adore. I have worked in this field for the last 21 years and I Love it! There is never a dull moment!!


Angi Bernard

Hi! I’m Angi Bernard! Born and raised in Edmond, Oklahoma. I grew up riding horses and playing outside. I went to OSU for a couple of years, but the working would was more for me. I have a wonderful husband, Scott, and a Step-son, Brady, 13 years old now. We have 2 dogs, “Olive”, French Bulldog, 6 years and “Charli”, Pitbull dog, 2 years. Olove to snow ski, eat candy and still play, Playing outside!


Tiffany C. Stanfiel

Receptionist/Veterinary Assistant