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

My Cat Ate a Fly: Vet-Verified Dangers & Tips

Cats will chase after and pounce on anything that moves, including small insects. Grasshoppers and flies are popular targets, and they flutter and...

My Cat Ate a Fly

Can Cats Eat Crickets? Vet Approved Health Facts & Precautions

We all know that our cats are carnivorous beasts hidden in cute bodies. Cats are obligate carnivores, which means the majority of their...

Can Cats Eat Crickets

Can Cats Eat Scorpions? Vet Approved Facts & FAQ

Cats naturally enjoy hunting, and small creatures are their favorite targets. Most insects do not pose threats to cats, but scorpions (and other...

Can Cats Eat Scorpions

Are Raid Fly Ribbons Poisonous to Cats? Vet Approved Facts & FAQ

It can be tricky to care for our pets while attempting to get rid of pests. If you have many bugs intruding on...

flies caught in a flycatcher tape

More related

Can Cats Eat Dragonflies

Can Cats Eat Dragonflies? Vet Approved Facts & FAQ

Cats love to chase things, especially things that fly quickly. It is one reason why so many birds die due to domestic cats...

Can Cats Eat Venison

Can Cats Eat Venison? Important Facts & Health Guidelines 

The word “venison” (from the Latin verb venari, meaning “to hunt”) refers to meat from large game animals, most commonly deer. Though not...

Can Cats Eat Seafood

Can Cats Eat Seafood? Vet Approved Facts & Health Guidelines

It’s a popular belief that cats love fish, even though fish are not a natural part of a feline’s diet. Some cats don’t...

charcoal bengal kitten lying

Coccidia in Cats: Our Vet Explains the Causes, Signs & Treatment

Coccidiosis is a parasitic disease that affects the intestinal tract and is very common in cats, particularly in kittens under 6 months old....

Keep reading

Can Cats Eat Corned Beef? Vet Approved Risks & Nutritional Information

Cold corned beef and boiled cabbage may be a St. Patrick’s Day staple for many Americans, but unfortunately, this dish is another human food that your cat needs to skip. While cats can and should eat meat, the high salt...

Can Cats Eat Corned Beef

Is Scented Litter Safe for Cats? Vet-Reviewed Facts & FAQ

Several online sources suggest that scented litter is bad for cats. It’s alleged to cause recurrent urinary tract infections (UTIs) due to irritation caused by fragrances added to mask the smell of cat pee. Others argue that scented litter should...

Catster_Is Scented Litter Safe for Cats

Why Is My Cat Shedding All of a Sudden? 8 Vet-Reviewed Reasons

When it seems like your cat’s fur is coming out in clumps or you’re finding little fluffy tumbleweeds everywhere all of a sudden, it can be worrisome. In most cases, shedding is just part of being a cat. It’s a...

Persian cat and a pile of shedded cat hair

Nulo Cat Food Review of 2025: Recalls, Pros & Cons

Review Summary Nulo is a California company that makes a wide range of cat and dog foods. It started with a man trying to take better care of his dog and blossomed into a full-grown pet care business, with high-quality...

Nulo Freestyle Cat Food Review

How to Use Cat Litter Deodorizers: 5 Vet-Approved Tips & Guidelines

It can be hard to mask the smell of cat litter when you share your life with cats. The last thing you want to do is walk in the door and inhale that intense, distinct odor. Many people resort to...

orange cat beside litter box

How to Make a Cat Less Skittish: 10 Vet Approved Tips & Tricks

While some cats love to meet new people and explore novel environments, others emphatically don’t. Particularly skittish cats will sometimes disappear entirely in the presence of visitors. While some cats simply prefer to be left alone, it’s often possible to...

bengal cat gives a high five paw to the owner

Is Prescription Cat Food Necessary? Vet-Verified Health & Nutrition Facts

There are so many types of cat food on the market, and a glance at the cat food section in a pet store proves this. With so many options, you might be confused as to which foods are truly good...

close up doctor filling up a prescription form

Earthborn Cat Food Review of 2025: Recalls, Pros & Cons

Review Summary Earthborn Holistic offers both wet and dry cat food variants and all but one range is grain-free food. The food is made to enhance nutrition in your cat, and the manufacturer claims to use fresh ingredients. They contain...

Earthborn Cat Food Review