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

Share

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

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.


Catster's Digital Magazine is Back!

Vet-approved health & behavior advice

Real cat stories & community features

Chatting About Big Cat Tourism, Lion Hunting, and Learning From Our Mistakes | Chatty Cattys, Episode 26

In this episode of Catster’s Chatty Cattys podcast, Nicole and Dr. Karyn dive into the dark side of big cat tourism and the...

Why Cats Sit by the Door (But Don’t Go Through It)

Door-sitting is one of those quirky little habits that almost every cat owner experiences at some point. You know how it goes: a...

Six Legs Are Better Than Three – How A Tripod Dog and Kitten Found Friendship Through Recovery

Sometimes the most meaningful friendships begin in the most unexpected places. At a Maryland veterinary hospital operated by Last Chance Animal Rescue, two...

The Original Space Invaders – Why Zero Respect for Personal Boundaries Is a Good Thing

Cats have a reputation for being independent, and in many ways they are. But anyone who has tried to work at a laptop...

More related

Can Cats Eat Canned Salmon? Vet-Reviewed Facts & FAQ

Cats are notorious for their love of fish, so feeding them a bit of canned salmon should be a no-brainer. What could be...

42 Luxury Cat Gifts for Cat Lovers & Their Cats

With the holiday season quickly approaching, many of us are searching for the perfect gift for the friends and family members on our...

How to Tell if a Cat Is Stressed: 12 Vet-Reviewed Signs to Watch For

In some ways, cats are a lot like people. They get stressed and anxious. Unlike humans, they can’t tell us their problems using...

How to Get a Cat to Come to You When Called: 7 Vet-Approved Steps

Most people don’t consider cats trainable, but that couldn’t be further from the truth. Cats may not be motivated to train in the...

Keep reading

Can You Be Allergic to Some Cats & Not Others? Vet-Reviewed Facts & FAQ

Cat allergies can be a real bummer, especially if you’re a cat lover hoping to introduce a cat to your home. There are things you can do on your side to minimize the effects of your allergies, like taking medications...

woman with cat allergy

Can Cats Drink Plant Milk? Vet-Reviewed Facts & FAQ

Plant milk has become a popular alternative to cow’s milk and is available at grocery stores or coffee shops. With more people turning to vegan options and plant-based foods and drinks, it’s natural to wonder if they are appropriate for...

Can Cats Drink Plant Milk

Why Is My Cat’s Jaw Swollen After Dental Work? Common Causes & Recovery Tips (Vet-Verified)

Given that dental disease and its subsequent problems are very common in cats, a staggering 50 to 90% of cats over 4 years old have some form of dental disease present. It may be no surprise to have discovered that...

cat being observed by a female veterinarian

Can Cats Eat Catnip or Is It Just for Sniffing? Vet-Verified Facts

Everyone knows that cats love catnip. If you’ve never seen a cat’s reaction to the herb, you must because it’s hilarious. Some cats go crazy on catnip, while others might just sit still and stare at nothing. The effects only...

Can Cats Eat Catnip

Best Waters for Cats: 6 Vet-Reviewed Types & FAQ

Although cats aren’t known to lap up a bowl of water like dogs, they need to remain hydrated, and it is also crucial for their water to be clean and fresh. There are a few sources of water and different...

cat drinks water

Colorado Hemp Honey Review 2026: A Detailed Look

More and more cat owners are beginning to understand the benefits CBD can offer their cats. Not only does this natural compound work incredibly well to help anxious kitties calm down, but it’s also useful for many chronic conditions, to...

Colorado Hemp Honey CBD Pet Products

Can Cats Eat Margarine? Health Risks & Advice

Cats do the craziest things when we least expect it, and that’s part of why we love them so much. There’s rarely a day that passes where your cat doesn’t leave you in giggles! Their eating habits tend to mimic...

Can Cats Eat Margarine

Can Cats Eat Sauerkraut? Vet-Approved Facts & FAQ

Sauerkraut is a food that generates strong opinions. Most people fall into one of two categories with sauerkraut: They either hate it or love it. Very few people fall in the middle. It’s a food with a strong, distinct taste...

Can Cats Eat Sauerkraut

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.