Heartworm disease is a serious threat to pets, but misinformation is one of its biggest enablers. Too many pet owners believe myths that leave their dogs and cats unprotected. At Animal Cove Pet Hospital, we often hear well-meaning questions like, “Do indoor pets really need prevention?” or “Aren’t heartworms only a summer issue?” For National Heartworm Awareness Month, we’re busting some of the most common heartworm myths that could be endangering your pet’s health without you even realizing it.
Heartworm Disease Misconceptions
Myth #1: Heartworm Only Happens in the Summer
It’s true that mosquito activity peaks in warmer seasons, but that doesn’t mean the threat disappears in fall and winter, especially in regions with mild climates. Mosquitoes can survive in basements, garages, and even inside your home. Year-round heartworm prevention is recommended by veterinarians because mosquitoes—and the risk they carry—never fully go away.
Myth #2: I’ll Know If My Pet Has Heartworms
Unfortunately, heartworm disease is nicknamed the “silent killer” for a reason. Many pets show no heartworm symptoms until the disease is advanced. In dogs, signs like coughing, fatigue, and weight loss may not appear for months. In cats, heartworm infection may go completely undetected or result in sudden collapse. By the time you see signs, serious damage may already be done. That’s why prevention and annual heartworm testing are so important.
Heartworm Prevention Myths
Myth #3: Indoor Pets Don’t Need Heartworm Prevention
Just because your pet spends most of their time inside doesn’t mean they’re off the hook. Mosquitoes easily find their way indoors, especially during warmer months. And since heartworms are transmitted through mosquito bites, even 100% indoor cats are still at risk. Prevention is necessary for every cat and dog, no matter how much outdoor exposure they have.
Myth #4: Skipping a Few Doses Won’t Hurt
Missing even one monthly dose can leave your pet unprotected. Heartworm preventives work by eliminating larvae from the previous month’s exposure—not the current one. If you skip a dose, those larvae can survive and begin maturing inside your pet. Inconsistent dosing is one of the main reasons heartworm infections still happen, even in otherwise well-cared-for pets.
Myth #5: Natural Remedies Are Just as Good
While it’s understandable to want gentle, holistic options, there is no natural product scientifically proven to prevent heartworm disease. Approved veterinary preventatives undergo rigorous testing for safety and effectiveness. Trust your vet to recommend the best choice.
The Real Truth About Heartworm Prevention
- It’s simple, safe, and highly effective when given consistently.
- It’s far less stressful—and less expensive—than treating a heartworm infection.
- Every pet, indoor or outdoor, in warm or cool climates, needs protection.
Prevention is one of the easiest steps you can take toward a healthier, happier life for your companion. Talk to your veterinarian about preventive heartworm medications and annual testing during their yearly wellness exam.
Don’t Let Heartworm Myths Jeopardize Your Pet’s Health
Heartworm disease is 100% preventable, and no pet should suffer because of a misconception. If you’ve ever wondered whether your pet really needs prevention, this is your sign to start now. Our team at Animal Cove Pet Hospital is ready to create a heartworm prevention plan that works for your pet in Foster City or nearby areas like San Mateo or Redwood City. Contact us to schedule a heartworm test or begin a monthly prevention routine today.
