About us

Rancho West Animal Hospital proudly serves Rancho Cucamonga and the surrounding areas for everything pet-related. Our Veterinary clinic and animal hospital is run and owned by Dr. Diana Stiles, who is a licensed, and experienced Veterinarian.

Our team is committed to giving the best care possible to our clients and their pets. As animal lovers ourselves, we understand the bond you and your family have with your pets. We bring that understanding to every interaction we have with you and your pet, starting from when you first enter our doors, to our exam, and the treatments performed, and even beyond your visit. 

 We are open six days a week, and provide routine care, urgent and emergency care. From Doctors to our staff, we are specially trained to not only provide your pet with the best care possible, but to also help you through the process with compassion, respect, and clear communication.


Find us on the map

Rancho West Animal Hospital

8645 Baseline Rd. Rancho Cucamonga,CA 91730 (909) 466-5490

Office Hours

Monday - Friday:

9:00 am - 6:00 pm


9:00 am - 2:00 pm




Read What Our Clients Say

  • ""Best experience! My poor dog had been itching for 5 days relentlessly. One injection and her allergies have been relieved! She is sleeping peacefully tonight! Thank you Dr. Stiles!! You are the Best!!""
    Dawn M
  • ""I could not have asked for a better place. Sadly I had to put down our dog last weekend. The treatment I got and my puppy got was over the top amazing. It's not an easy thing to put your pet down. Having amazing customer service is always a good thing but here they actually care! Thank you from the bottom of my heart for everything!""
    Kerri D
  • ""We found our new fav. Vet!! The first time I met Dr. Stiles I right away had a good feeling she gave my father and I a warm welcome and introduced herself. She took a look at our pregnant female and after examining her she told us the problem and was 100 percent correct. She could have taken advantage of us and gave us the run around but she didn't. She is honest and trustworthy. We had another concern with a puppy and again very honest with her answers and did not try and rip us off or stress out the puppy in any way. I will be telling everyone about Dr. Stiles at rancho vet!!! Thank you for everything you do.""
  • ""I love it here. The doctor is spectacular
    Really nice and professional
    Lovely office""
    Marianne Brenna K.