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.

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

My Cat Ate a Fly

Cats will chase after and pounce on anything that moves, including small insects. Grasshoppers and flies are popular targets, and they flutter and glide with unpredictable grace full of starts and stops that are the definition of perfect feline entertainment. But if your cat just snacked on a fly, you may be wondering if there’s a trip to the emergency veterinarian in the future. The answer, you’ll be happy to hear, is probably not.

Flies carry parasites, bacteria, and viruses, so they’re not great to have around, but the chance of a cat ending up with a parasitic infection after eating a fly is low. Reach out to your veterinarian if you have any concerns about your cat’s health or if they show signs of illness, such as stomach trouble that doesn’t start to improve within 24-48 hours.

divider 3 paws

What About Flies That Have Been Sprayed With Insecticide?

The amount of poison found in one fly that met its end due to insecticide is unlikely to cause illness in cats. However, if your cat comes into direct contact with an insecticide, this is a different story.  Many insecticides are toxic to cats and should be stored in places that kitties can’t access, such as a locked cabinet. Products that contain permethrin are a particular concern since they have the potential to be fatal 1.

Permethrin is commonly found in bug sprays and products designed to be sprayed on fabric to keep mosquitos and other biting insects at bay. It’s also found in canine-flea treatments, which is why cats can’t use the same anti-flea products as dogs. Make sure you read the label of any insecticide being used around the house or directly on an animal.

When to Contact Your Veterinarian

Reach out to your veterinarian immediately if you suspect your cat has come into direct contact with an insecticide. Don’t wait for signs to develop as permethrin toxicity can quickly lead to tremors, seizures, and even death. Make sure to have the product your cat got into on hand so you can provide your veterinarian with accurate information about what they consumed and when.

Consider writing down important information you don’t want to forget, such as when your cat was exposed, and if they are showing any unusual signs, such as twitching, lethargy, drooling, or agitation.

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

Is It True That Some Cat Foods Contain Flies?

There’s currently a great deal of interest in developing ways to use insect-based protein, including black soldier fly larvae, in human and pet foods. Pet foods featuring insect proteins are currently available in some European nations. Insect farming is a much more sustainable practice than traditional agricultural practices such as beef and chicken production. It requires far less land, water, and energy than meat production and produces far less greenhouse gasses.

divider 3 paws

Why Do Cats Play With Bugs?

Cats are excellent hunters. The urge to stalk, spring, and pounce is instinctual. A study published in the British Journal of Nutrition found that bugs and insects make up 1.2% of a feral cat’s diet. Our well fed, domesticated cats are probably not hunting flies and grasshoppers for their nutritional value, but to meet their hunting needs. Even indoor cats still retain their hunting instincts and will practice on whatever they can find.

cat and grasshopper
Image Credit: Deniza-40x, Shutterstock

Do Flies Lay Eggs on Cat Food?

Flies can lay eggs on cat food that’s been left out, but it usually takes around 24 hours for maggots to appear. Regularly washing your pet’s food dishes can help prevent flies from bothering your cat’s food. Bowls used for food should be washed after every use, and wet food should only be allowed to sit for about 2 hours before being removed. Cleaning spills quickly after they occur can also minimize the chance of flies being attracted to your pet’s eating area.

Are There Ways to Naturally Get Rid of Flies?

Flies like hanging out around garbage cans and decaying materials like garden mulch, as they prefer to lay eggs on organic waste. Once they find a suitable place to breed, flies often return repeatedly.

However, a few modifications can encourage them to head elsewhere, including using trash cans with sealing lids, covering food, and staying on top of spills and crumbs. Installing window and door screens and ensuring they’re in good working order can keep flies outside where they belong. You can contact your veterinarian before using bug spray to confirm that the product is safe for use around cats.

a fly on dog or cat food
Image Credit: laila63, Shutterstock

divider 3 paws

Conclusion

Cats enjoy chasing and pouncing, and insects such as flies are commonly on the receiving end of this instinctive feline behavior. There’s generally no cause for concern if your cat eats a fly or two. However, flies can carry lots of germs, so there are things we can do to discourage them from coming into our homes.

Cats can often be persuaded to leave insects alone by engaging in short but frequent play sessions with them. Using toys that most resemble natural prey animals, e.g. mice, allows your cat to use up some of their hunting energy.


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

Can Cats Eat Pig Ears? Vet-Approved Facts & FAQ

Cats are carnivores and require diets rich in protein from animal sources to thrive. Although pork is fine for cats to eat, and...

How Much Does It Cost to Cremate a Cat: 2025 Update

After a cat’s death, several decisions must be made, including what to do with their body. Planning ahead is vital, and the overwhelming...

Can Cats Eat Sweet Potato? Vet-Verified Facts & Feline Nutrition Tips

Sweet potatoes seem to be gaining traction in the pet food world. You may have seen dog foods advertised with sweet potato as...

Can Cats Eat Cranberries? Vet-Reviewed Facts & FAQ

Cats are known for loving their meat. But did you know that your feline companion may benefit from consuming some fruits and veggies...

More related

Why Does My Cat Lay, Sleep, or Play in the Litter Box? 6 Vet-Reviewed Reasons

It is more common than you might think to see a cat lying or even sleeping in their litter box, and it is...

The Gift of Anticipatory Grief: How to Start Healing Before a Pet Dies

Anticipatory grief is grief that arises before a death—when you know it’s coming, but your cat is still alive. On one end of...

120+ Green-Eyed Cat Names: Great Ideas for Your Beautiful Cat

Looking for a unique and interesting name for your new feline friend? Maybe your new furry companion has emerald or jade irises. If...

How to Syringe Feed a Kitten: 5 Vet-Approved Steps & Safety Guide

In some cases, syringe feeding a kitten may be necessary, and while this form of feeding isn’t the best, it is the only...

Keep reading

9 Best Vitamins for Cats in 2025 – Reviews & Top Picks

Sometimes cats need extra vitamins, just like people do. However, muddling through the vast array of different supplements and health claims online can be a chore. How can you tell that you are getting a safe and effective product? That...

pet owner feeding blue maine coon cat with treats outdoors in garden

5 Best Cat Pheromone Diffusers in 2025 – Reviews & Top Picks

Did you know that the first form of communication that occurs between animal species is chemical communication? According to Dr. Valarie Tynes, DVM, President of the American College of Veterinary Behaviorists, it’s achieved through pheromones, and this way of “communicating”...

orange cat lying on the sofa

Are Sunflowers Toxic to Cats? Vet-Verified Facts & Safety Tips

Bright, colorful, and towering far above most of our heads in their natural growth state, sunflowers are the kind of bloom that makes a statement. If you’re a cat owner, however, you’re probably wondering if you can make a statement...

Catster_Are Sunflowers Toxic to Cats

My Cat Will Only Drink from the Faucet: 5 Reasons Why

Long-time cat owners know that getting their cats to drink enough water can sometimes be a struggle. Because cats always seem to choose the strangest way to complete ordinary tasks, you’ll also find some that will drink but only from...

cat drinking from faucet

Healthy Cat Ears: 6 Vet-Verified Care Tips

Like dogs, cats need a regular grooming routine to stay healthy. Brushing your cat is key, especially if they have long hair, but did you know you should also check your cat’s ears regularly? This is to prevent ear infections,...

owner-checking-his-cats-ear

How Many Kittens Are in a Litter? Vet-Reviewed Health Facts

Is there any baby cuter than a kitten? They are soft, adorable, tiny little lion-like creatures with the cutest mannerisms. Have you ever wondered how many kittens a cat could have when they reproduce? Or, maybe you suspect your kitty...

cat breastfeed new born kitten

Does Catnip Really Make Cats High? What You Need to Know!

It’s no secret that many cats love catnip. The plant, which is in the mint family, has a potent effect on felines, making them roll around, playfully bite things, and generally act like they’re high. But what’s really going on?...

Gray Cat Enjoying Fresh Catnip_Anna Hoychuk_shutterstock

Can Cats Eat Ice Cream? Vet Approved Facts & Alternatives

If you enjoy ice cream’s cold, sweet taste as a frequent dessert, you might be tempted to let your cat take a lick off your bowl afterward. However, it’s essential to consider whether cats can safely eat ice cream. Ice...

Can Cats Eat Ice Cream