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Understanding the threat

Protecting your pooch is job #1. Learn about the causes of heartworm disease and how HEARTGARD Plus can help protect your dog.

Get to the heart of the problem

When it comes to heartworm disease, prevention is the most effective treatment for you and your dog.

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5 signs your dog may have heartworms
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3 tips for preventing heartworm disease in your dog
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Where do heartworms come from?
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Easily contracted. Potentially deadly.

70 days after a single bite from an infective mosquito, adult heartworms can reach your dog’s lungs. And then the real trouble starts: Serious and potentially fatal, heartworm disease can cause lasting damage to the blood vessels of the heart and lungs. If your dog has heartworms, you might notice signs, including coughing, difficulty breathing, sluggishness, reduced ability to exercise, and even loss of consciousness. Or you might not notice anything, as not all dogs exhibit symptoms—which is why prevention is recommended over expensive treatment that can be a prolonged, painful, and not always successful ordeal for your dog.

Inside or out, year-round, all dogs are at risk for heartworm disease no matter where you live in the US2
Infection risk
no data high risk
2018 USA Canine Heartworm
Positive Cases
Total Tested