Why does my dog/cat need to have a blood test before starting heartworm medication?

Giving heartworm preventative to dogs or cats that are already infected with adult heartworms can be harmful and even fatal to the animal. A blood test before starting any medication will tell your veterinarian if your pet is already infected. Heartworm preventatives kill off heartworm larvae-the medicine does not kill adult heartworms. An owner might think his cat or dog is fine if the pet is on a heartworm preventative, but if the pet was already heartworm-positive, the disease is only worsening and the heartworm preventative is not helping.

Boarding Request Form

Our facilities will allow your pet to be as comfortable as possible while you are away. Please feel free to contact us for a tour of our facilities at any time.

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Pet Health Library Articles

Yucaipa Animal Hospital is pleased to provide a library of professional articles updated by practice experts. Browse our library of topics or quickly find the article you need.

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Prescription/Food Refill Request

Please use the form below to request your prescription refill or food item. This will save you time when picking up your order. Many prescriptions require your pet to be examined.

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