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.
Pet Allergies | Understanding the Itch
Whether it’s pollen, certain foods, dust mites, or even household items, many things can trigger reactions from your pets. Learn more about the most common signs and triggers of pet allergies, along with helpful tips for managing them at home.
Learn More »Our Clients Love Us

Love MAAH I always leave knowing that my girls were given top of the line care!
Blanca Barrios

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

4.6
Rating on
Google Reviews!
