Does my dog have heartworm? Is preventative medication safe for him?

If he has always been on it and hasn't missed any doses, then he should be fine to continue with the prevention. Now, that being said, no prevention is 100% effective so the reason we test every year is to check and make sure there was no break-though issues with the product. If a dog has heartworm disease there is a chance the prevention could cause a medical problem. In this case, I think the benefit of him taking the heartworm prevention outweighs the very tiny risk that he could be positive and have a reaction to the medication. Hope this helps. If you have more questions you can always opt for a private consultation where we can chat back and forth. That way you can ask as many questions as you'd like. Best wishes!

Hello. Heartguard is generally considered very safe, even in a dog with a current heart worm infection. If there was a reaction due to the presence of heartworms, it is almost always some kind of pulmonary event. So, it is possible that he has just developed a sensitivity or had a one off reaction to the Heartguard. Do think about having Buster tested before giving another pill, & do try to remember to give it every 30 days. All heartworm medications do a great job, but only if doses are not skipped, especially for dogs living in warmer climates. And if he does not seem better tomorrow, please make an appointment with your vet to have things checked out. Thanks for using Petco Pet Education Center, formerly Petcoach.

You will need to go to a vet as it requires a negative heartworm test before it can be prescribed. This is a simple, fast blood-test that will let the vet know it is safe to start preventive medication. Why this is required is if your pet already has heartworms and is given the medication, it can kill the worms too quickly which can cause blockages of the blood vessels leading to potential stroke or death. Making sure your pet is negative first will ensure it is safe to administer.

Yes, I usually start dogs under six months on a heartworm medication without a blood test. The test checks for antibodies to adult worms and they need six months to grow into adults so that’s why the test isn’t needed. I’m glad you are using heart guard since it’s safe to use even if by some chance he has an early heartworm infection. Certainly have his blood tested at your annual exam and vaccinations. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for Jac.

From that description, it sounds like he may have tape worms. The heartworm test doesn't test for tapeworms (or any intestinal parasites) and the medication is heartgard wouldn't kill tapeworms. A fecal test doesn't always show the worm eggs either for this particular type of parasite. I'd recommend giving your clinic a call to see what they policies are - you may be able to pick up medications from the description alone, or they many need you to schedule an appointment. Finally, make sure Buddy is on a good flea preventative -- he got the tapeworms from eating a flea. He could definitely have just found it outside, but it's worth mentioning!

Heartworm disease is completely preventable dogs. There are now multiple options for heartworm preventative is available to pet owners. Most often these preventatives are given orally once a month or sometimes applied topically once a month. There are options now also for injections that last about six months. It just depends on what your veterinarian has available. It is usually recommended to give heartworm preventative year-round but this may vary depending on where in the country you live. Any dog who has not been on heartworm preventative, should be tested for heartworms prior to starting prevention. And then heartworm testing is recommended every one to two years while on heartworm preventative.

The dog should be heartworm tested and then started on a prevention, if negative. Heartgard, Interceptor, and Sentinel are all oral medications that work well with preventing heartworms. You should also treat him with a flea/tick prevention. I like oral NexGard, Bravecto, or Credellio instead of the topical spot on solutions.