About Our Hospital

Welcome to Happy Tails Animal Hospital, your local veterinarians in Vacaville, CA.

We’re proud to provide a wide variety of veterinary medical services for cats and dogs in Vacaville & surrounding areas!

We are a small animal veterinary hospital in Vacaville, CA. We practice fear-free medicine – all of our staff are Fear Free Certified Professionals and we are a Gold Status Cat-Friendly Practice. We opened August 15, 2016, but our doctor-owners have over 35 years of experience between them.

Drs. Jill André and Mary Diedrich are excited to welcome you and your furry family to Happy Tails!

Please also visit and like our FACEBOOK page!

Fear Free Medicine

What we do at our clinic to make you and your pet more comfortable.

Cat Friendly Practice

Find out more about what it means for us to be Cat Friendly.

Meet Our Team

Meet our dedicated Veterinarians & Veterinary staff.

Take a Clinic Tour

Take a virtual tour of our clinic.