11Jill Christofferson, DVM


Dr. Christofferson received her bachelor’s degree in biology from UC Berkeley before receiving her Doctor of Veterinary Medicine from UC Davis in 1993. Since then she has worked in general practice and emergency medicine. She has a special interest in dentistry and believes that your pet’s oral health is an imperative part of your pet’s overall health.

Dr. Christofferson was raised in Orinda and resides in the East Bay with her husband, daughter, and stepdaughter; their dog and 3 cats. In her free time, she enjoys hiking, working out in the gym and the occasional golf game.

Shann Ikezawa, DVM

Associate Veterinarian

Dr. Ikezawa attended UC Davis and graduated with her Doctor of Veterinary Medicine in 1997. Since then she has worked in general practice, urgent care medicine and surgery before joining the WCVH team in 2017. She has a special interest in, and love for, brachycephalic breeds and their unique medical needs, as well as soft tissue surgery.

Dr. Ikezawa resides in the Bay Area with her husband and her dog. Originally from Oahu, many of her hobbies center around her culture, including Polynesian dancing and playing the ukulele! She also enjoys snowboarding, hiking, snorkeling and volunteering her time and skills locally and internationally.

Kelley Cayton, DVM, CVA

Associate Veterinarian

Dr. Cayton completed her undergraduate degree at Middlebury College in Vermont before earning her Doctorate of Veterinary Medicine from UC Davis in 2012. In 2015, she became certified in veterinary acupuncture from the Chi Institute of Traditional Chinese Veterinary Medicine. Her favorite aspects of general practice are preventive care and developing bonds with her patients and their families. She enjoys the collaborative relationship with clients and colleagues, and bases her practice on treating each one of her patients like her own family member.

Dr. Cayton resides in the Bay Area with her husband, daughter, two dogs, and two cats. Outside of work, Kelley enjoys getting outdoors with the dogs, camping with friends, dabbling with new recipes, improving her green thumb, and going on a nice day of antiquing.

Leah Isaacson, DVM, CCRP

Associate Veterinarian

Dr. Isaacson completed her undergraduate education at UC Berkeley and fell in love with the Bay Area. She attended veterinary school at Ross University and completed her clinical year at the University of Missouri. Dr. Isaacson enjoys surgery, dentistry, pain management, and geriatric care. She received her Certification in Canine Rehabilitation from the University of Tennessee and loves tailoring recovery plans for patients experiencing chronic pain or recovery from surgery or acute injuries. She has a passion for general practice and the relationships that are cultivated with both patients and clients.

Dr. Isaacson was born and raised in Southern California and now resides in the Bay Area with her husband, whom she met in veterinary school; their 3 daughters, 2 cats, and 2 dogs. She enjoys reading, skiing, running, cooking, and taking advantage of any brief quiet moments to just relax.

cobie-zieglerDana Thistlethwaite, DVM

Associate Veterinarian

Dr. Thistlethwaite completed her undergraduate degree at UC Santa Cruz before earning her Doctor of Veterinary Medicine from UC Davis in 2008. She enjoys all aspects of veterinary medicine, but in particular, internal medicine.

She resides in the Bay Area with her husband, two daughters, one dog, and two cats. Outside of the hospital, she enjoys reading, hiking, and cooking.

cobie-zieglerAllison Grange, DVM

Associate Veterinarian

Dr. Grange is originally from the East Bay and did her undergraduate studies at UC Berkeley. After graduation, she attended vet school at the Royal Veterinary College in London, UK where she met her husband who is also a veterinarian. After graduating in 2007, they moved back to the US and practiced in San Diego and Boston for several years before moving back to the East Bay in 2012. They share their lives with their adorable young daughter and son, three cats, and a Golden Retriever.

Dr. Grange has special interest in feline medicine and internal medicine. In her off time, she enjoys skiing, crafting e.g. macrame and crochet, hiking, and traveling.