Dr. Coleen Dossey has been with Town & Country Veterinary Hospital since April 1995. She earned a B.S in Biochemistry, an M.S. in Animal Physiology, and a Doctorate of Veterinary Medicine (D.V.M.) degree at the University of California at Davis. In addition to practicing traditional veterinary medicine, she has pursued advanced education in integrative medicine and is an I.V.A.S. Certified Veterinary Acupuncturist.  Dr. Dossey earned certification by the Chi Institute in Chinese Herbal Medicine in 2014 and is excited to offer both holistic treatment options for your pet, as well as traditional veterinary medicine.  When she is not busy tending to the needs of her two dogs and three cats, she enjoys spending quality time with her husband, watching her sons play lacrosse, gardening, quilting, and practicing yoga.

Dr. Lisa Mason has been with Town & Country since 2014.  Dr. Mason earned her Bachelor of Science degree from the University of Michigan and graduated with honors from Michigan State University Veterinary School.  Before relocating to the Tri-Valley area, Dr. Mason worked at a large multi-doctor veterinary hospital in Southern California for 16 years.  Dr. Mason shares her home with Emma, a Thoroughbred, Spike, a Tennessee Walker, and Cassie (a.k.a. Cassidy Buttercup Dandelion), a rescued Golden Retriever mix.  In her spare time, she enjoys horseback riding, taking her children to and from their various sports and activities, and spending quality time with her husband, family, and friends. 

Dr. Janelle Castillo has been with Town & Country Veterinary Hospital since 2020.  She was born and raised in the Bay Area and has always wanted to work in a profession that would challenge her and keep her thinking. Coupled with her love for animals, the veterinary profession seemed to be the perfect fit. In 2014 she received her Doctorate of Veterinary Medicine from Western University of Health Sciences.  She is also a wife, a pet parent to Penny, a Pitbull mix, and Eleven, a Terrier mix, and a mother to two young children. On her days not spent practicing veterinary medicine, she enjoys quality time with her family (four-legged and two-legged) and has recently developed a love for indoor plants.