• Creepy, Crawly Critters

    There are many parasites we need be concerned about that can affect our pets. Ticks are one of the most common and frightful. Most people shudder just at the thought of a tick, let alone finding one on their pet or in their house. Unfortunately, the people who study these things tell us we should expect

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  • Flea Preventative Medications: Oral vs. Topical

    Fleas are not only a source of irritation and frustration, but they also pose a serious health threat to animals. These tiny external parasites can carry a variety of diseases, including bubonic plague, and severe infestations may cause deadly levels of blood loss in very small or young pets, according

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  • Fleas, the Frustrating Pest

    Consider the following scenario: You arrive home from a long flight from a wonderful, two-week vacation. As you drive home, you remind yourself the boarding kennel is already closed and you have to wait until tomorrow to pick up your dog, Max. You finally walk in the front door, happy to be home. As

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  • Giardia: A Parasite of Many Species

    If you have a friend who camps or fishes, you may have heard that they had been infected with Giardia. Or your veterinarian may have told you that your cat or dog had Giardia. In either case, you probably wondered, can I catch it as well? Giardia is a protozoan parasite (one-celled organism) that can

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Location

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Office Hours

Our Regular Schedule

Diamond Bar Office

Monday:

8:00 am-6:00 pm

Tuesday:

8:00 am-6:00 pm

Wednesday:

8:00 am-6:00 pm

Thursday:

8:00 am-6:00 pm

Friday:

8:00 am-6:00 pm

Saturday:

8:00 am-1:00 pm

Sunday:

Closed

Testimonials

Read What Our Clients Say

  • "We have been going to Companion Animal Hospital for over two years. The staff at Companion Animal Hospital is the most caring and considerate group of people who treats all of our "kids" like they are their own. We are very fortunate to be able to call them and have them there when we needed them. Awesome service!!"
    Yoshi M.
  • "I found this place about 7 years ago when I was desperately calling around to see if a doctor would be willing to work on a Saturday to perform emergency surgery and save my pup. The receptionist called Dr. Lee and he agreed to drive back early from his church retreat for a 6 p.m. surgery ON A SATURDAY. We are in Orange County now, but we still make the drive so our sweet dog can see Dr. Lee for check-ups. I am forever grateful."
    Julia S.
  • "A few years ago we had do put our 16 yr old Charlie to sleep because he had a stroke. They were so caring and compassionate. They gave us all the time we needed with him. Now it looks like we will need to take out 15 yr old yorkie :(. We won’t take her anywhere else."
    Patricia H.