Welcome to Mountain Avenue Animal Hospital!
Mountain Avenue Animal Hospital provides quality veterinary care for cats, and dogs in Ontario, CA and the surrounding communities.
We are committed to treating our patients with compassionate hearts, gentle hands, kind words, and superior care. Additional pet services include pet laser therapy and pet grooming.
For new clients, please call (909) 986-4548 today to make an appointment for your pet. For returning clients, please book an appointment online.
Q&A on Cats: Your Curious Cat Questions Answered
Discover answers to common cat care questions, including why your cat meows, how to tell if they're sick, and tips for feeding, scratching, and playing.
Learn More »Our Clients Love Us

Very fast and efficient. Employees are very caring individuals. If you need cate for your pet, I highly recommend Mountain Avenue Animal Hospital for all your pets needs.
Elaine Wilbur

Clean friendly not expensive.
Elisa Gonzalez

4.6
Rating on
Google Reviews!
