Frequently Asked Questions

Here you will find answers to the most frequently asked questions for Heart Shield Plus.® Don’t see the answer you are looking for? Contact Us today and we are happy to answer any questions you may have.

  • I live in a part of the country that has a short mosquito season. Does my dog need heartworm protection?

    Yes. In fact, the American Heartworm Society is now recommending year-round prevention, even in seasonal areas. Dogs may be bitten by a mosquito during the summer and not reveal infection for up to six-and-a-half months. Heart Shield Plus® Chewable tablets, given monthly, protect your dog against heartworm disease as well as treat and control intestinal parasites year round.

  • Why does my pet need a prescription for heartworm medication?

    Heartworm preventives are “legend” drugs, which by federal law require a prescription. A doctor-patient relationship must be established before a prescription can be written. Your veterinarian assesses the heartworm status of the dog before prescribing these medications. Giving heartworm preventives to dogs that already have heartworms can lead to severe medical reactions which could be harmful or even fatal to the dog.

  • When should I treat my dog with Heart Shield Plus®?

    Most veterinarians and the American Heartworm Society recommend treating your dog each month year round. By not following this advice, you could put your pet at risk for heartworm, roundworm, and hookworm infections. One Heart Shield Plus® chewable tablet administered on the same day each month is all your dog needs to remain protected from these potential infections.

  • Where can I download the Heart Shield Plus® insert?

    You can download and view the package insert here.

  • What is the test for heartworms?

    Your veterinarian can tell if your dog is infected through a simple blood test. Puppies up to six months of age do not require testing.

  • Are puppies immune from heartworm infection because of antibodies in their mother’s milk?

    No, there is no maternal transfer of protection against heartworms. If puppies are exposed to mosquitoes carrying infective larvae, they can become infected.

  • How does heartworm medication protect my dog?

    Monthly heartworm preventives work by interfering with the maturation of the immature (larval) heartworm to an adult. Monthly medications, given every 30 days, have a retroactive effect and will kill larvae that have invaded the dog in the preceding month.

  • Are heartworms more common in certain areas of the United States?

    Heartworms have been found in dogs native to all 50 states. The highest infection rates for dogs have been observed within 150 miles of the Atlantic and Gulf coasts and along the Mississippi River and its major tributaries.

Why Choose Heart Shield Plus®?

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