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.

Can Cats Eat Flies? Vet-Reviewed Facts & Health Guidelines

Cat hunting a fly

If you’ve ever seen a cat pounce on a fly and eat it, you may be wondering if this is safe or potentially harmful for your furry friend. So can cats eat flies? Thankfully, flies aren’t toxic or poisonous, and there’s probably not much to worry about if your buddy eats a fly or two. Even pests properly treated with insecticides aren’t likely to cause issues as the amount of toxins contained in one fly isn’t likely to be high enough to cause problems. However, always check with your veterinarian if you have any concerns about insects or other items your cat eats.

divider 2 cats

Can Cats Get Parasites From Flies?

Eating fleas, ticks, spiders, and bees is generally considered more problematic than eating flies in terms of parasites and bites or stings, but that doesn’t mean it’s not without its risks. Some flies carry Isospora organisms that may cause a disease called coccidiosis. In kittens, coccidiosis can cause diarrhea or other gastrointestinal signs, while adult cats are more often unaffected. Flies can also potentially transmit other infections by landing on infected fecal material, which a cat could then ingest.

vet examining the sick cat with stethoscope
Image Credit: 4 PM production, Shutterstock

Why Do Cats Chase and Eat Flies?

Cats most likely pursue insects like flies because it triggers their hunting instincts and gives them something fun to do. Cats are natural predators, and in the wild, they earn their daily bread by stalking, hiding, and pouncing on prey. Indoor cats don’t have the same opportunities to engage in hunting, so they often take advantage of opportunities provided by insects. Many cats enjoy going after flies but don’t bother to eat the ones they catch.

Do Cats Eat Flies Because They’re Hungry?

Most cats eating sufficient amounts of high-quality cat food get all the calories and protein they need during regular mealtimes. While flies do contain protein, a few insects won’t satisfy a cat’s nutritional requirements, so eating flies is likely more of an instinctual hunting behavior than it is due to hunger. Cats on their own in the wild often gravitate towards eating small animals such as rodents, birds, and rabbits to provide nutrition.

cat hunting in grass
Image Credit: SJ Duran, Shutterstock

divider 1 paws

What Can I Do to Convince My Cat to Stop Catching Flies?

Getting cats to shift their attention to non-living “prey” often involves a two-pronged approach: getting rid of the temptation and providing cats with appropriate alternatives.

Ways to Minimize Flies

Flies often breed outdoors and enter homes through open windows, so adding screens to windows and fixing ones that need repairs can keep insects outside. Covering food and putting it away immediately can help reduce the number of flies swarming about. Regularly washing pet food dishes with soap and hot water and not allowing wet food to sit for more than a few hours before cleaning it up may also be beneficial. Sealing trash cans can deprive flies of attractive places to breed, and removing rotting fruit and vegetables before they start to smell can reduce the number of flies in your home.

cat in the screen door
Image Credit: VooDooPickles, Shutterstock

Ways to Encourage Cats to Engage in Alternate Activities

Providing your cat with several toys that allow them to engage their hunting instincts may give them enough of a thrill to lose interest in chasing after bugs. Cats are generally happiest when getting regular exercise and playtime. It allows them to get rid of excess energy, stimulate their mind, engage their hunting instincts, and hang out with their favorite person simultaneously.

A few short 10 to 15-minute play sessions every day give cats multiple opportunities to let loose. Adding a few toys cats can engage with on their own may further minimize the desire to catch flies. Food puzzles make cats use their bodies and minds to get treats or kibble and provide tastier rewards than flies!

divider 3 paws

Conclusion

Cats chase and hunt flies regularly, and there’s likely nothing to be concerned about if your kitty decides to eat one. Cats eating flies generally isn’t problematic, but they don’t provide much in the way of feline nutrition. It is unlikely to be an issue if a cat eats a fly or two treated with insecticide as the amount of toxin involved is unlikely to be high enough to cause trouble, but double check with your vet if this happens.

Indoor cats probably chase flies because it gives them an outlet for their instinctual hunting behaviors. This behavior is not motivated by hunger since many cats chase and kill flies and never bother to eat them. Getting rid of flies and giving cats other ways to get their hunting in can help minimize fly-eating activities.


Featured Image Credit: sophiecat, 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

4 Home Remedies for a Spider Bite on Your Cat – Our Expert Guide

Some cats love to investigate anything and everything, which sometimes includes spiders! Spider bites can be serious, so while there are home remedies...

8 Must-Have Apps for Cat Owners in 2025

From apps that can help you work out what to do if your cat has an accident and needs first aid to those...

10 Best Pellet & Pine Cat Litters in 2025 – Reviews & Top Picks

Being a cat owner can be one of the most rewarding experiences for us humans, but one of the distinct disadvantages is dealing...

Seal Point Ragdoll Cat Breed Info, Pictures, Temperament & Traits

A Ragdoll is a larger breed of cat that is well-known for its tendency to flop when you pick them up. They come...

More related

Why Does An Adult Cat Go Limp When You Grab Their Scruff? Vet-Verified Reasons & FAQ

When mother cats want to move their kittens, they gently bite the skin on their necks to lift them. The kittens almost always...

17 Most Beautiful Cat Breeds (With Info & Pictures)

Cats are chock full of physical characteristics that make them downright adorable, from their sweet little faces to their long, expressive tails. While...

Things Our Cats Hate: The Wednesday Cats of Catster

Welcome to the Wednesday Cats of Catster! Every month, we ask our cat-loving Catsters to weigh in on a new topic. This week,...

Do All Cats Knead? Vet-Approved Behavior Explanation

Whether you think it’s adorable or find it utterly annoying, you’ve likely caught your cat kneading at some point. This behavior usually takes...

Keep reading

Where Do I Put My Cat’s Bed? 5 Vet-Approved Ideal Spots

Cats are drawn to all kinds of weird spots in the house, and cat owners understand how much they love to nap. You can find them basking in the sunlight on a sun-drenched windowsill, curled up in the top corner...

tabby cat sleeping in basket cat bed by window

Can Cats Sense Earthquakes Before Humans? What Vet-Reviewed Science Tells Us

Have you ever seen a video of a cat freaking out just moments before an earthquake? There are many of these videos out there, which has to mean something, right? But before you jump to any conclusions, you’ll want to...

cat hiding in the dark

10 Flea and Tick Diseases in Cats: Vet-Verified Facts & FAQ

Living with cats means you will, at some point, have to deal with fleas and potentially ticks. Although we often talk about them in the same breath, they are quite different. Fleas are smaller and have six legs while ticks...

domestic-cat-with-skin-desease

Siberian Cat Health Problems: 5 Common Issues

The Russians have a phrase, “Siberian health,” used to describe the fortitude and vitality of the people of Siberia, who endure brutal winters with astonishing resilience. Siberian cats, also known as Siberian Forest Cats, share these qualities, with a solid...

Catster_Health Problems of Siberian Cat

10 Best Stainless Steel Cat Water Fountains in 2025 – Reviews & Top Picks

Cats are picky when it comes to drinking. They’ll drink from the puddle in your backyard but turn their noses up at your indoor water sources if it doesn’t pass their inspections. Most veterinarians recommend water fountains as they provide...

grey cat drinking water from bowl

Weruva Cat Food Review 2025: Recalls, Pros & Cons

Review Summary Weruva Inc. was founded by Stacie and David Forman in 2007 and is named after the couple’s three cats, Webster, Rudi, and Vanessa. The company was started after the couple grew tired of trying to find high-quality food...

Weruva Cat Food Review

What Is Cat Mirroring? Vet-Reviewed Facts & Why They Do It

Cat mirroring refers to when cats do things in a similar way as humans or other animals in their environment. However, it can sometimes be misinterpreted as a way of cats being able to copy certain behaviors consciously, while it...

bengal cat gives a high-five paw to the owner

Crave Cat Food Review 2025: Recalls, Pros & Cons

Crave Cat Food is manufactured by Mars Petcare and has been on the market since 2017. The brand currently offers a limited variety of dry foods, all of which are grain-free and high in protein. The food is affordable and...

Crave Cat Food Review