Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Heartworm Prevention for Cats: 3 Vet Approved Methods

Sick cat in animal hospital

Of all the diseases our cats can suffer from, heartworm disease is one of the worst. This disease is transmitted by mosquitoes that carry heartworm larvae that burrow into the body and can go on to grow up to 12 inches long and live in the lungs, heart, and blood vessels. The result is organ damage, lung disease, and heart failure.

Though cats are atypical hosts for heartworms (meaning they get heartworms less often than dogs, and worms usually don’t make it to the adult stage if a cat is infected), heartworm disease is still a significant concern for feline parents. Even worms that aren’t adults can cause damage to your cat, particularly in the form of what is known as heartworm-associated respiratory disease (HARD). And because immature worms are more difficult to detect, heartworm disease in cats can often go undiagnosed.

Since treatment of heartworm disease in cats is difficult and expensive, the best way to avoid it in your favorite feline companion is by preventing heartworms in the first place. But how can you do that? Below you’ll find three ways you can help prevent heartworms in your cat.

divider cat paws oct 2024

The 3 Ways to Prevent Heartworm in Cats

1. Heartworm Medicine

Woman at home is giving a special medicine
Image Credit: Veera, Shutterstock

Absolutely the best and easiest way to prevent heartworms in your pet is by giving him or her heartworm medication. If you’re located where there are lots of mosquitos year-round, vets recommend you give this medication to your cat monthly.

There are several types of heartworm medications available (which are sometimes combined with flea and tick medication), so you shouldn’t have issues finding one that works well for your pet. A monthly product is the easiest and best way to prevent heartworm disease and is simple to do.

Before giving any new medication to your cat, we recommend you consult a veterinarian for the best advice on which would be the best treatment option.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money


2. Keep Cats Indoors

cat watching bird on the window
Image Credit: Andrzej Puchta, Shutterstock

Another way to help prevent heartworms in your feline friends is by always keeping your cats indoors. It’s not impossible for a mosquito to get into your home, but you’ll have far fewer of these bloodsuckers indoors than outside. This method of prevention isn’t as fool-proof as giving your pet heartworm medication, but it can go a long way in helping reduce your pet’s chances of getting heartworm.


3. Mosquito Control

man fogging with disinfectant
Image Credit: triocean, Shutterstock

You can also try controlling your local mosquito population. This prevention technique is a bit more difficult than the other ways of preventing heartworms, but it is possible. And you’ll appreciate having fewer mosquitos around as well! We will take a closer look below at how you can reduce the number of mosquitos around your home.

divider cat paws 2 oct 2024

Tips for Controlling the Mosquito Population

One of the best ways to keep mosquitos off your property is by getting rid of standing water since this is where mosquitoes lay their eggs. This includes emptying birdbaths, flowerpots, buckets, kiddie pools, trash cans, etc. If you can’t empty an item containing standing water, you can cover it with a tight lid. Another area where standing water can occur is in tree holes, so fill those in so they don’t end up holding water. Finally, if you have a septic tank, you’ll want to check it over for any gaps or cracks and repair those you find.

Your other options for preventing mosquitos are using larvicide to treat standing water that is too large to empty out or cover up to prevent mosquito eggs from hatching. You can also use insecticide to kill off adult mosquitos.

divider cat paw scratch oct 2024

Conclusion

It’s important to prevent heartworms in cats, as there is no treatment for this disease in felines. While cats are atypical hosts that don’t get heartworms often and don’t have heartworms grow to adult size, if they do get them, they’re still at risk for health complications from these parasites.

The best and easiest way to prevent heartworms in your pet is via heartworm medication, but you can also keep your pet indoors at all times and try controlling the mosquito population around your home. Controlling the mosquito population is a bit of work, but you can reduce how many mosquitoes are around by getting rid of standing water or treating areas with larvicide or insecticide.


Featured Image Credit: Kachalkina Veronika, Shutterstock

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

How to Get a UK Pet Passport in 2025: An Expert Guide

A pet passport was used in the United Kingdom to easily travel with your pets through Europe. However, since 2021, when the UK...

How to Tell if Your Cat Has Fleas: 10 Vet-Reviewed Signs to Look For

If you’ve never dealt with fleas before, you might be unsure if all of the scratching your cat has been doing lately is...

Why Do Cats Like Cardboard? 5 Interesting Reasons

It’s not a secret that cats have a special affinity for cardboard. Most cat owners have found themselves baffled by the fact that...

Balinese vs Siamese Cat: What’s the Difference? (With Pictures)

Have you ever wondered about the differences between Balinese and Siamese cats? The two breeds are incredibly similar, and for good reason. The...

More related

Can Cats Eat Pumpkin Puree? Vet Approved Facts & Nutrition Guide

When people think of pumpkins, they usually think of falling leaves, bonfires, chilly temperatures, and seasonal treats. However, did you know that some...

National Microchipping Month 2025: When & What It Is

The facts of lost pets tell a sad tale. Roughly 15% of cat owners will lose their pet within 5 years. Outdoor felines...

Why Do Cats Like to Cuddle? 5 Vet-Verified Reasons

There’s arguably nothing better than a warm cat cuddling on your lap while you relax on the sofa. While cats have a reputation...

How to Get a US Pet Passport in 2025? Expert Guide & Tips

While it’s possible to travel internationally with your pet, it’s important to make sure that you have all the proper documentation you need...

Keep reading

Can Cats Eat Pomegranate? Vet-Reviewed Facts & FAQ

One of the fun parts of owning a cat is giving them treats now and again. Though we stick with cat treats most of the time, sometimes it’s tempting to give them a bite of our food. But how healthy...

Can Cats Eat Pomegranate

Caring For Feral Cats: Should You Do It? Vet-Approved Advice

If you’re a pet lover and have a feral cat colony in your neighborhood, worrying about them is natural. Do these felines have enough food? Are they too hot or too cold? It’s tempting to step in and take over...

feral cats

What’s the Price of Cat & Kitten Vaccinations in UK? 2025 Costs

Cat and kitten vaccinations are vitally important to every cat’s health. There are various types of vaccines, such as a kitten’s first vaccine or a frequent traveler cat that needs specialized vaccines for travel. This article will look at how...

Veterinarian giving injection to cat_Africa Studio_Shutterstock

How to Calm an Angry Cat: 7 Vet-Approved Steps & Tips

Cats can experience a wide range of emotions, anger included. Although they might not experience anger the same way we do, there’s no doubt that felines can get angry from time to time. Anger is not an ideal experience for...

owner petting a hissing angry tabby cat

Can a Cat Detect Seizures? – What You Need to Know!

Most people know that certain dogs qualify as service animals under the Americans with Disabilities Act (ADA). Dogs have the ability to detect seizures in humans before they happen, and these dogs are known as seizure-alert dogs. While this ability...

Domestic cat lying on owner's lap

Will a Cat Overeat If They Get Excess Food? Vet-Approved Facts & Feeding Tips

Cat owners who spend time away from their pets often worry about their pets going hungry. To ensure that their pet is never too far from a meal, they often leave food out for them to freely snack on during...

brown white cat eating from feeding table

How to Manage Cat Separation Anxiety: 8 Vet-Approved Tips

Although separation anxiety is often associated with dogs, it’s also a problem that can occur in cats. Knowing how to deal with separation anxiety in cats can be difficult, and it can become frustrating to manage this issue. To help...

lonely cat sits on a bed and sadly looks at the window

Why Is My Cat Stalking Me? Normal vs Worrisome Behavior

Cats stalk their prey, stalk their toys, and sometimes even stalk their food. However, what concerns many cat owners is when their cats decide to stalk them. You’re probably familiar with the behavior of cat stalking and pouncing. They slowly...

woman sitting beside her cat