Heartworm disease is a serious and potentially fatal illness spread by mosquitoes. Worms live in the heart, lungs and blood vessels, and early infections often cause no signs at all. A simple blood test is the best way to know whether your pet is infected.
We recommend regular heartworm testing for dogs, even those on year-round prevention, and can discuss testing for cats as well. Testing helps make sure your pet's prevention is working and that any infection is found early.
Why Testing Matters, Even on Prevention
Doses can be missed, vomited up or given late, and no product is perfect. Regular testing is important because:
- Infected pets often show no signs until the disease is advanced
- Starting prevention in an infected dog without testing first can be risky
- Early detection makes treatment safer and more successful
- It confirms your pet's prevention plan is working
Signs of more advanced disease can include a mild cough, tiring easily, weight loss and a swollen belly. In cats, signs may look like asthma or vomiting.
How Heartworm Testing Works
Testing takes only a small blood sample and is usually done during a routine visit. If a test is positive, your vet may recommend more tests, such as bloodwork or X-rays, to confirm the infection and see how it's affecting your pet.
If your pet tests negative, your vet will help you choose a heartworm prevention that fits your pet and your routine, and set a schedule for future tests.
Questions about Heartworm Testing?
Call us or book an appointment online, and our team will help you decide on the next step for your pet.
Heartworm Testing: Frequently Asked Questions
How often should my dog be tested for heartworms?
Do cats need heartworm testing?
Why does my dog need a test if they're on prevention?
What happens if my pet tests positive?
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