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

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.


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

Is a Cat’s Sense of Smell Stronger Than a Dog’s?

Cats vs. dogs have been a subject of debate for as long as the two have been human companions. But there are some...

How to Get a Cat to Like a Puppy: 10 Proven Methods

Adding a new puppy to your family can be an exciting time, but there might be one member of your family who’s less...

11 Ways to Keep Cats Out of Flowerbeds: Easy & Expert Tips

We all love our feline friends. They keep us company and even add beauty and elegance to our houses. But there are probably...

What Kind of Music Do Cats Like? What Science Says

Cats do seem to enjoy music, but not the same music that humans do—according to the latest research. There are many other forms...

More related

Do Bengal Cats Like Water? Vet-Reviewed Facts & Ancestry

If you’ve ever wanted a cat that will play in the water with you, a Bengal is your choice! A survey done of...

5 DIY Pill Pockets for Cats You Can Make Today

If you’ve ever attempted to give your kitty medication in pill form straight away, you are familiar with their look of disapproval and...

Why Does My Cat Sit on My Shoulder? 6 Vet-Reviewed Reasons & What to Do

If you’re lucky enough to have a cat in your home that craves attention and likes being around you, count yourself fortunate. There...

9 Best Limited Ingredient Cat Treats in 2026 – Reviews & Top Picks

This article has been reviewed for factual accuracy by a qualified veterinarian. It should not however, replace advice tailored to your pet by...

Keep reading

Cataracts in Cats: Vet Approved Causes, Signs & Treatment Options

Have you looked into your cat’s eyes recently, only to see a cloudy spot? If so, this may be a cataract. Cataracts aren’t as common in cats as in dogs, but they can occur (and some breeds, in particular, are...

Cat with cataract

Do Cats Need Wet Food? Vet-Reviewed Benefits, Facts & FAQ

Are you wondering whether wet food is necessary or just a luxurious treat for your feline companion? The truth is that wet food is not an absolute requirement for a cat’s health, but it does come with a few benefits...

cat eating canned tuna

Can Cats Eat Pumpkin Pie? The Interesting Answer

Cats are obligate carnivores, meaning their digestive system is designed to digest meat, bones, and other animal body parts. Pumpkin pie is not on this list, and while cats can eat pumpkin or plain canned pumpkin, pumpkin pie is bad...

Can Cats Eat Pumpkin Pie

How Far Can a Male Cat Smell a Female Cat in Heat? Vet-Approved Facts & FAQs

If you’ve noticed your male cat being more than eager to get outside lately, yowling at the door, and being quite the nuisance, it could be because he smells a female cat in heat. Your male can smell a female...

domestics-cats-mating

Intestinal Blockage in Cats: Vet Reviewed Signs, Causes & Treatment

If you suspect your cat may have an intestinal blockage, please know that your cat needs emergency treatment ASAP. Knowing the signs of an intestinal blockage is imperative for all pet owners. Puppies and kittens are especially prone to this...

cat recovering from spay surgery

Why Do Cats Put Their Butt in Your Face? 4 Vet-Reviewed Reasons for This Behavior

Have you ever been put in the awkward situation of having a cat’s butt right in your face? You could be minding your own business and reading or working on your laptop, and suddenly, your cat jumps up and gives...

Mekong Bobtail Male Cat

Are Hemp Cat Collars Safe? Facts, Benefits, & FAQ

Of all the necessities we provide our cats, protection is one of the biggest. Placing a collar on your cat is one way to make life easier with felines. A collar can help identify your cat if they’re lost or,...

putting a collar on a cat

Can Cats Get Kidney Transplants? Our Vet Discusses Facts & Considerations

Kidney disease is one of the most common causes of illness and death in cats, with almost 80% of cats over 15 years experiencing some form of renal insufficiency. Although it is usually associated with older felines, younger cats—through congenital...

two different cats standing side by side outdoors in the garden