• Understanding Pet Behavior

    Because our pets can not raise their paws and tell us when something is wrong, we as owners need to know what to watch for to know when our pet is ill. The Dog Scoot Boogie A dog dragging his hind end across the floor is his way of telling you his anal glands are full and need emptying. Anal glands

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  • Three Keys to Successful Potty Training for Your Dog

    Potty training your dog can be easy or difficult...the difference is in how much time and dedication you are willing to put into training. Follow these simple tips to get your puppy on the right path to accident-free living. Set a schedule: Decide on a schedule and stick to it. In a family situation

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  • Ferrets Can Be Furry Family Too

    Fragile Ferrets Entertain Families and Friends Your new family pet will provide you with entertainment and laughs as he or she climbs and crawls through tubes, hoses, boxes, clothing and pipes. Keeping your ferret safe and secure in your home is easy with a bit of advanced planning. Create or

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  • Family Friends Aren't Always Furry - Think of Feathery Friends!

    Transitioning a Bird into Your Home When including a bird of any size and species in your household, take time before the transition to prepare. Use these tips to welcome your new bird and create a happy experience for your family. Choose housing with bars or slats that are only half the width

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  • Printable Games & Puzzles

    Mac's Pet Word Search Pets in Space Scramble Cosmic Pets Crossword Puzzle

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  • Introducing Your First

    Pets aren't the only ones who need a little (or a lot) of help adjusting to life with a newborn. No matter how much you plan ahead, the addition of a new family member may be difficult for your pet. Remember, your dog or cat was your first "baby" and is used to being the center of your attention. So

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  • Internet Reunites Lost Pets and Owners

    Everyone loves the amazing stories of dogs and cats who travel long distances to find their way back home or even locate their owners in a new city. Unfortunately, these happy tales are the rare exception to the rule. For every pet that makes it back after leaving, there are tens of thousands who

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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.