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.

Do Indoor Cats Need Flea Treatment? Vet-Reviewed Facts, FAQ & Tips

Share

cat having flea treatment
There are a great number of benefits to keeping cats indoors, especially with all the dangers they could face when out and about. However, believe it or not, house cats can still get fleas, so they still need to be treated with flea preventatives on a year-round basis.

In this post, we’ll explain how indoor cats get fleas and why flea and tick preventatives are important for all cats.

divider 1 paws

How Do Indoor Cats Get Fleas?

Not going outdoors isn’t enough to keep indoor cats safe from fleas, as these can be brought into your home in a variety of ways. Let’s take a closer look at how these pests can get onto your cat even if they don’t go outside.

1. Other Pets

If you also have a dog, it’s possible for them to bring fleas into your house, which can then affect your other pets. Even if the dog is given flea preventatives, it can take some time for products to actually kill the fleas, meaning dogs can still carry live fleas and their eggs, and these can hop onto your unprotected cat or the eggs can drop off in your home. This is why treating all your cats and dogs with flea preventatives is essential.

Portrait of chihuahua and west highland terrier dogs in a pet store
Image Credit: BearPhotos, Shutterstock

2. People

People can also transmit fleas to their cats by visiting a house with a flea infestation. So, let’s say a friend or family member’s cat or dog has fleas, and they pop over to visit you. They could be bringing fleas or flea eggs on their clothes right into your home. The same goes for if you visit them. Fleas could come back with you.


3. Second-Hand Fabrics

While second-hand shopping is a great way to save money and help the environment, previously owned items, too, can be vehicles for fleas. For this reason, it’s wise to thoroughly disinfect and wash any second-hand clothes, blankets, or other items you’ve bought in case they come from a home with a flea infestation.


4. Pet Establishments

If your indoor cat or another pet has spent time in a cattery, boarding facility, or shelter, they could pick up fleas and bring them home. Visits to the vet also put non-protected cats at risk of fleas.


5. Mice and Rats

Mice and rats can also carry fleas, so if you have some unwelcome guests scuttling around, your indoor cat could easily end up infested with fleas, too. Proper cleaning routines are key to keeping mice and rats at bay, especially in the kitchen. It’s also crucial to check that your garbage cans are well-covered and that you close up any holes in your walls.

On that note, please don’t use cruel traps like snap traps or glue traps to capture mice and rats. Instead, stick to humane traps, like catch-and-release traps that don’t kill or harm the animal.


6. Moving House

Flea infestations could be present in your new home when you move, and the chances are increased if the home is carpeted. Central heating is another factor. Fleas thrive in warm areas. Even if you can’t see the fleas, there could still be eggs, larvae and pupae hidden away. In fact, adult fleas only comprise around 5% of a flea infestation, with the rest consisting of these other stages of the flea life cycle which live in the home and are invisible to the naked eye (or very hard to see in the case of eggs).

divider 1 paws

Can Cats Get Fleas in Winter?

Contrary to the common misconception that fleas aren’t a risk in colder periods, cats can most certainly get fleas in winter because fleas can live indoors. The warm indoor environment protects them from the cold, and the central heating can make matters worse. For this reason, cats should be given flea preventatives year-round, not just in the warmer months.

Signs of Fleas

Fleas and eggs can be hard to spot at first glance, so you’ll need to exercise due vigilance. A flea comb can help you get a better look at the coat and skin. Apart from witnessing the fleas scuttling on your cat’s coat, here are some signs to watch out for:

  • Scratching
  • Biting the skin
  • Restlessness
  • Overgrooming
  • Small red bites (including on you)
  • Black dirt (flea feces)

If you suspect your cat has fleas, contact your veterinary clinic. Your vet will recommend the right medication for your cat; these come in various forms including tablet form and spot-on form (applied to the back of the neck). It’s best to get your vet’s input on this because cats’ needs sometimes differ in terms of medication depending on their age, size, and health status.

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

For homes with a flea infestation, you can purchase sprays designed to kill fleas and flea eggs to help—just make sure they’re not harmful to your cat and are used as instructed. Pest control operators can do this if you don’t feel comfortable doing it yourself.

Unfortunately, these sprays aren’t a cure-all. You’ll need to clean thoroughly and regularly with a special focus on washing all bedding in hot water and vacuuming carpets, skirting boards, and any hard-to-reach nooks and crannies. Steam cleaning can help with upholstery and carpets. It may take a while to completely eradicate these pests from your home.

Beige or cream coloured cat scratching its ear
Image Credit: Lubo Ivanko, Shutterstock

Extra Tips for Using Flea Preventatives

  • Never use flea treatments for dogs or cats (and vice versa). This could have toxic results.
  • Make sure the flea preventatives you’re using are suitable for your cat’s weight. Your vet can offer advice if you’re unsure.
  • Create a schedule for applying your cat’s flea preventatives and stick to it.

divider 1 paws

Final Thoughts

In a nutshell, whether they’re indoor dwellers or spend time outdoors, all cats need to be treated with flea preventatives suitable for their weight range on schedule to prevent the risk of an infestation. If you need to know more about fleas and treating your cat properly, please consult your veterinarian for advice.


Featured Image Credit: goodluz, 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

2 Responses

  1. Yes Thank you,, my long haired cats dont show any sign of fleas , but they groom and itch constantly. Is there any other bug they could have? Should I use a flea product anyway?

    1. Hi Beth Leyland, thanks for your comment. Excessive grooming and itchy skin could be caused by a lot of reasons, from allergies to anxiety. If you need more guidance here you book a one-on-one call at www.pangovet.com.

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

Ask Dr. Paola – Help! My Male Cat Gets Into Fights! (March 9, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Why Your Cat’s Poop Smells Like a Biohazard

Nobody enjoys litter box duty, but sometimes it gets unbearable. The smell hits you from across the room. You’re scooping faster, lighting candles,...

RIP Your Furniture? Not With This Guide to Cat Scratch Damage Control

Your couch looks like it survived a minor apocalypse. The curtains have mysterious vertical shreds. That new rug you splurged on is already...

Celebrating 15 Years as the Most Popular Resident of No. 10 Downing Street

For almost 300 years, a rather unassuming Georgian building of black bricks with a shiny black door has been the official residence and...

More related

7 Common Kitten Health Issues: Our Vet Answers

Kittens are generally pretty hardy little things—as long as they have a warm, dry place to sleep and the right type of food,...

400 Viking & Norse Cat Names: Great Ideas for Strong Cats

Bringing a new cat into your family is an exciting time, and your home will become a bit more entertaining with a new...

Can My Cat Wear a Harness All the Time? 4 Vet-Reviewed Risks & Safety Tips!

Who says you can’t walk a cat? Admittedly, not all felines are willing to be harnessed and leashed to go outside with you...

Can You Give Cats Human Pain Medication? Our Vet Explains

Seeing animals in pain has to be one of the worst things a pet owner can experience, and we want to be able...

Keep reading

What Houseplants Are Poisonous to Cats? 15 Vet-Verified Toxic Types

Wondering what plant to get that won’t upset your cat? We’ve got you covered. This post lists 15 common houseplants that should be avoided by cat owners—usually. In some cases, cat owners can have a plant that is not necessarily...

a black cat with succulent plants

Will a Male Cat Mate With a Female if She’s Not in Heat? Vet-Reviewed Feline Behavior Explanation

As cat parents, we know that female cats mate when in heat, but what about male cats? They don’t go into heat like females, so when do they mate? Will they mate with a female if she isn’t in heat?...

Black-and-white-Thai-cats-with-bell-collars

What to Do When a Cat Bites You: Vet-Reviewed Steps to Take & Risks

It may be hard to believe that your beloved kitty would ever bite you, but cat bites and scratches happen more often than you might think. Approximately 66,000 hospital emergency visits occur every year due to cat bites. If you’ve...

The cat bites the woman's hand

How to Train a Cat to Stay Indoors: 7 Vet-Approved Tips

Of the over 160 million cats in the United States, roughly 30—80 million are unowned and roaming free1. Many cats with owners also live outdoors, at least part of the time. Outdoor cats pose a risk to wildlife and are...

cute cat rearing up licking finger of the woman kneeling on the floor

Can Cats Eat Gravy? Nutritional Facts & FAQ

Like humans, cats enjoy a good meal. And while many people might think that all cats only eat dry food, that is not the case. Many cats love gravy, and several wet foods are made with gravy; some even have...

Can Cats Eat Gravy

Wellness vs Blue Buffalo Cat Food: Our 2026 In-Depth Comparison

If you’ve spent time wandering around your pet food store, you might’ve noticed two brands that are a bit higher-end than normal: Wellness and Blue Buffalo. Each of these brands was started fairly recently, and both have cashed in on...

Wellness VS Blue Buffalo

When Do Cats Stop Growing & Reach Their Full Size? Vet-Verified Facts & FAQ

As you witness a kitten starting to grow up, you may wish they could remain at a young age for as long as possible. But, as we all know, that tiny, fluffy, playful period has to come to an end...

Tabby Cornish rex kitten sitting on owners lap

Why Does My Cat Cry When I Leave? Vet-Verified Reasons & Solutions

While cats are often considered not to be terribly interested in people, they’re actually sensitive, loving creatures that become deeply attached to those they share their lives with. Companion cats develop bonds with their people that resemble those formed between...

Cat meowing

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.