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Dr. Swarnjit Singh - DVM, PhD

Dr. Swarnjit Singh

Dr. Swarnjit Singh earned his Bachelor’s in Veterinary Science and Animal Husbandry (BVSc&AH), followed by his Masters in Veterinary Science (MVSc) majoring in Immunology with a minor in Biochemistry, from the College of Veterinary Science of Punjab Agricultural University, India. 

Dr. Singh then worked as an Assistant Professor of Immunology at his alma mater for two years, and practiced small animal medicine part-time. In 1994, he came to the United States to pursue a PhD in Veterinary and Medical Entomology at Oklahoma State University.

His studies focused on the immune mechanisms and effect of transmission of various diseases by insects and ticks to vertebrate hosts, with the focus on Lyme disease. 

After finishing his doctoral program in 1997, Dr. Singh worked in academic research at the University of Georgia, the University of Arkansas, and the Centers for Disease Control in Fort Collins, Colorado. In 2004 he resumed working as a small animal practitioner in Denver, Colorado (2004-2006) and then in Santa Rosa, California (2006-2010). Dr. Singh is the owner and Medical Director of the American Canyon Veterinary Hospital. Dr. Singh’s practice philosophy places major emphasis on prevention and early detection of disease processes. He lives in American Canyon with his wife Katya and their dog, "Sadie".


Dr. Susan Sparks - DVM

Dr. Sparks &

Dr. Susan Sparks graduated from Colorado State University, College of Veterinary Medicine, in 1987, and shortly after returned to her native Bay Area to accept a position in a busy small animal hospital in Concord, CA.

Practicing medicine and surgery for four years, she then accepted a position at the University of California, Berkeley, where she worked as a research associate in pesticide chemistry and toxicology for the next fifteen years. Returning to practice after leaving the university, she spent the following eight years at a veterinary hospital in Antioch, providing care for animals at the city shelter in addition to private clients.

Recently relocating to Fairfield, Dr. Sparks is excited to become part of the American Canyon Veterinary Hospital team. In her spare time, she gardens and cares for her menagerie, which includes an elderly (22 year old) leopard gecko, a bearded dragon, and her shelter rescues: a green iguana and an adorable Chihuahua mix named Morris. When the animals permit it, she enjoys hiking and bike riding, and as many trips to Yosemite as possible with her husband Jay.


Julie Allen - Practice Manager/Senior Technician

Jessi Allen - Office Manager/Client Services Supervisor

Julie and Jessi &

Julie has been in the Veterinary industry for over 13 years. She started her career as a receptionist in a small practice in Sacramento, CA, and quickly moved into the Veterinary Technician position.

Over the years, Julie gained experience in general practice, emergency medicine, as well as specialty (Reproductive) medicine. She worked as a Receptionist, Technician, Supervisor, and is now the Practice Manager and Senior Technician at ACVH. 

Jessi grew up in the Veterinary field, with her Mother working in Veterinary Hospitals throughout her childhood. She started her career in 2005 as a Receptionist in a busy 24 hour emergency hospital in Santa Rosa, CA. She soon moved up to a supervisor position, gaining experience in general practice and specialty (Reproductive) medicine. Jessi is the ACVH Office Manager and Client Services Supervisor. 

Julie & Jessi have been with American Canyon Veterinary Hospital since it opened. They have been working together since they met at a specialty Veterinary Hospital in 2008. They were married in 2010, and their first baby, Carter Marie Allen, was born on March 24, 2011. They reside in Vallejo, CA with their daughter, 2 dogs "Mona" and "Chuck" and their 2 cats "Wicked" and "Myrtle". 

They enjoy life by taking advantage of all the outdoor activities they can with their family, such as kayaking down the Russian River, hiking with their daughter & dogs, camping etc.