Online Appointment

Our Team

Dr. Peter Dowell


Born in New York City to British parents, subsequently moved back to the UK. We then moved back to the US when I was seven hence dual citizenship.

Always very interested in nature and science.

Degrees in Forestry, Biology, graduate school in Parasitology and Doctor of Veterinary Medicine followed by a Matching Program Internship in surgery and medicine.

Additionally membership in the American Veterinary Medical Association, The Royal College of Veterinary Surgeons, nominated to the Phi Zeta veterinary honor society

Interests in endocrinology, dermatology, surgery, small exotic medicine and most aspects of small animal medicine and surgery.

Former practice owner of the Covington Creek Veterinary Clinic in Mendocino and the Helix Pet Hospital in San Diego.

Practice philosophy:

Cutting Edge Knowledge,
Old Fashioned Compassion

Come. Sit. Heal.

Dr. Riley

Doctor Rebecca Riley was born and raised in Marin county. After attending Novato High School and Sonoma State University, she was accepted to the UC Davis School of Veterinary Medicine in 2008. After graduating, she completed a rotating equine medicine and surgery internship at North Carolina State University. She continued there for another year finishing a fellowship in sports medicine and imaging. After two more years of practicing on high level sport horses, she decided the smaller athletes in her life were where she wanted to spend her time. The last four years of small animal practice have been the best of her veterinary career and she knows that each year will get better still. She has a special interest in veterinary imaging. When not practicing medicine Dr. Riley enjoys being an active member of her church community, gardening, trail running, hiking and generally any outdoor adventure with her Cairn terrier, Hickory.

Dr. Riley enjoys interacting with the clients and caring for their pets. She is available Wednesday – Saturday weekly.

Dr. Ratekin

Dr. Ratekin loves all aspects of the veterinary field. She is available on Fridays weekly.

Contact Info


Our first appointment starts at 8:30am and our last appointment is at 5:30pm. We do offer same day appointments when available, but please call beforehand.

Monday: 8:00am 6:00pm
Tuesday: 8:00am 6:00pm
Wednesday: 8:00am 6:00pm
Thursday: 8:00am 6:00pm
Friday: 8:00am 6:00pm
Saturday: 9:00am 5:00pm
Sunday: CLOSED  

About Us

The Alto Tiburon Veterinary Hospital is a full service small animal veterinary hospital. We strive to achieve fully integrated care using the latest in hospital telemedicine, digital radiology, rapid in house diagnostic care from bloodwork and urinalysis with full digital sediment analysis in minutes to rapid cardiology specialist analysis... Continue Reading

2021 © The Alto Tiburon Veterinary Hospital. All Rights Reserved.
Made with by