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.


Dr. Molly Duffy

Dr. Molly Duffy grew up in Muskegon, MI. Her love for animals started at a young age. She grew up with multiple dogs and a cat. She also competed and trained dressage horses. After high school, she was determined to move to Oklahoma to officially become a Sooner. In college at OU, she studied Zoology with a focus on pre-veterinary studies. After graduating, she began veterinary school at Ross University in the West Indies on the island of St. Kitts. While in veterinary school, she was president of the veterinary golf club. She also became scuba certified and loves to shark dive. She moved back to the United States and performed her clinical rotations at Colorado State University. During that time she focused much of her studies on equine reproduction.

Upon graduation she started her veterinary career at Vista Equine Colorado, practicing in all aspects of equine reproduction. She was able to assist in oocyte aspiration, embryo transfer and stallion collection. After being away from her family in Oklahoma for six years, she decided to move back to be closer to home. At that time she began her career at Banfield Pet Hospital, focusing on small animal medicine. As a small animal doctor, she loved being able to see a variety of cases and perform surgery. In 2020, she became licensed as a certified veterinary medical acupuncturist through Cura Core Academy for all animals. She is excited to be a part of the Waterloo Animal Hospital team and work with both small and large animals.

In her free time, Dr. Duffy loves to ride her horse, Athena. She also has a doghter, a Cavalier King Charles Spaniel named Lilly. She is very active and loves to go up to the mountains in Colorado to go snowboarding and hiking. In the summers she loves to spend time at her family’s lake house in Eufaula. She is always cheering for the Sooners and Thunder teams…and occasionally even rooting for the Cowboys.


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