Our Doctors

Circle C Animal Hospital

9600 Escarpment Boulevard, Suite 950
Austin, TX 78749




Our Doctors


Dr. Richard Rafferty

Richard Rafferty earned 3 degrees with high honors from Texas A&M. B.S. in Poultry Science, M.S. in Immunology,and DVM (Texas A&M College of Veterinary Medicine Class of 1993)

Following an externship at the Houston Zoo he came to Austin to begin a career in companion animal medicine. Over the next few years he narrowed his focus to specialize exclusively in canine and feline internal medicine and soft tissue surgery.

Dr. Rafferty has been married to Lisa Rafferty since 1993 and they are blessed with 2 children - twins - Thomas and Ellie. Dr. Rafferty practiced in Northwest Austin for many years before moving his family to Circle C and eventually opening Circle C Animal Hospital in 2007.

Dr. Rafferty believes strongly in the power of the human-animal bond. He believes that companion animals, through their unconditional love, nurture their human companions health, heart, and soul. He loves working together with clients to provide the best possible care for their beloved companions.

When at home Dr.Rafferty loves spending time with Lisa,Thomas, & Ellie; playing basketball, fishing, and reading

Dr. Rafferty is an active member of the American Animal Hospital Association (AAHA), the American Academy of Feline Practitioners (AAFP), the American Veterinary Medical Association (AVMA), and the Texas Veterinary Medical Association (TVMA). 

Dr. Leea Greenville

Dr. Greenville was born and raised on Oahu, Hawaii where she graduated from Punahou School, now famous for also educating President Barack Obama. After getting a bad case of "Island Fever" she moved to Massachusetts where she received her BS in Animal Science from the University of Massachusetts, Amherst, graduating magna cum laude. She then continued her adventures in Fort Collins, Colorado where she earned her DVM degree from Colorado State University.

With a natural love of puzzles and problem solving, Dr. Greenville is always ready to tackle the most challenging of internal medicine cases.  She works hard to identify not only  the exact cause of your pet's symptoms, but also the best course of medical treatment.  She frequently consults with veterinary specialists around the country to provide you with the most recent treatment advances. Her calm manner and gentle hand will put your pet at ease.  She strives to make your pet's appointment as stress free as possible--in fact, it's not unusual for her patients to not even notice that they're getting their shots!

Dr. Greenville practiced small animal medicine and surgery in Las Vegas, Nevada and Montgomery, Texas before moving to Austin in the summer of 2008. She practiced as a "relief veterinarian" at multiple clinics in Austin before finding a home here at Circle C Animal Hospital in October of 2008. Dr. Greenville lives in the Austin area with her three children, two dogs and three cats.

Dr. Greenville's interests include internal medicine, surgery, and the human-animal bond. She is passionate about animals and remains an advocate for your pet's health.

She is an active member of the American Veterinary Medical Association (AVMA) and the Texas Veterinary Medical Association (TVMA).

Dr. Monica Silvers

Dr. Silvers grew up in Miami Beach, Florida and received her BS in mathematics from University of Miami.  She went on to have a career as a software engineer/systems analyst for a major motion picture company in Burbank, California, but her true calling “kept calling.” She returned to Florida and attending veterinary school at the University of Florida, receiving her DVM in 1999. She practiced both large and small animal medicine for two years in Pennsylvania, then returned to Southern California and practiced small animal medicine there until she moved to Austin in 2006. She loves all things Austin has to offer: great food, great live music, beautiful lakes, and nice weather. At work, she particularly enjoys challenging medicine cases, dermatology, feline medicine, neurology and treating geriatric patients. She looks forward to helping people keep their pets happy and healthy well into their golden years.  She is very excited to be part of a team that provides progressive compassionate care to a community of her neighbors and their furry loved ones. She lives in South Austin with her husband and four rescue dogs: a boxer mix, a setter mix, a beagle mix and a pit bull/basset hound.

Dr. John Clint Duncan