Is It Okay For Cats To Eat Flies? Should I Worry? (2022)

Is It Okay For Cats To Eat Flies? Yes, cats can eat flies. Like many other insects and pests, Flies do not pose an immediate threat to cats. Problems may arise only if the fly is presently carrying a disease that it can pass on to your cat or if it has been contaminated with hazardous chemicals.

A cat’s stomach can ingest and digest a wide variety of things, including flies. Some cats’ stomachs, however, are more sensitive than others. Eating flies may cause mild stomach upset, such as vomiting or diarrhea, and a lack of appetite for a short period. When a fly lands on a contaminated surface, bacteria, protozoa, and other creatures may be carried on its legs, subsequently transmitted to the cat when she eats the fly.

Consequently, a cat that continues to eat flies is more likely to get sick. When a fly comes into contact with hazardous insecticidal chemicals, the pesticide may be passed to the cat when the fly is eaten, particularly if many flies are eaten at once.

Continue reading to discover more about the consequences of your cat eating flies.

Is it bad for cats to eat flies?

Is it okay for cats to eat flies

Cats can eat flies. Like many other insects and pests, Flies do not pose an immediate threat to cats. Problems can arise only if the fly is currently carrying a disease that it can pass on to your cat or if it has been contaminated with harmful pesticides.

Can Cats Eat Flies, And Is It Good For Them?

Bugs are thought to make up a third of a cat’s diet, so flies aren’t something to be concerned about. Flies are a good source of the following nutrients:


Like many other insects, such as crickets, Flies are high in protein. A fly’s larvae, for example, are 45 percent protein. According to Comparative Biochemistry and Physiology, cats are opportunistic omnivores who adjust their food intake according to the available energy density. While cats would have to eat a lot of flies to meet their protein needs, any protein is better than none, so flies provide a good source of animal protein when other, more nutritious foods are unavailable. Cats require protein to maintain their energy levels. Protein contains amino acids, which are the building blocks for tissue, organs, skin, hair, tendons, blood, and muscles in the body. It also keeps cats healthy and strong by supplying energy to vital body processes. A cat’s body cannot function properly if certain amino acids are missing from its diet. Blindness and other health issues can result from severe deficiencies.


Small amounts of iron are found in both houseflies, and black soldier flies, which helps prevent cats from becoming iron deficient. Iron is required for the following functions: the formation of healthy red blood cells.

They are getting oxygen into the body and getting carbon dioxide out. Cats get all of the iron they need from their food, but they can become deficient if high-quality food isn’t available. As a result, a fly can help a cat’s iron levels once in a while.

Why do cats play with flies before killing them?

In addition to attempting to obtain food, cats use hunting for various purposes. This can be seen when the cat catches a fly but does not eat it right away. We frequently see the cat stun the fly and then play with it in these situations. They can let the fly float away for a few moments before pouncing on them again and repeating the process. This may appear to be cruel, but the cat benefits from it. The following are some of the reasons for this behavior:

Skill Development: 

Kittens have an innate hunting instinct, but they must hone it through skill development. They will learn certain techniques from their mother, but they will also practice with her siblings to better understand their abilities and limitations. When the cat is separated from its mother and siblings, it will seek other people to practice its skills. Other household pets, human companions, small critters like flies, and even inanimate objects could be among them.


This type of hunting is also beneficial to one’s health. A cat will feel physically and emotionally bored if he does not have the opportunity to use his instinct. As a result, behavioral issues will arise, and they may even become aggressive. This is one of the reasons why the cat will not only attempt to eat flies but will also spend a significant amount of time doing so and playing with its prey.

Maternal instinct:

 It is known that female cats tend to play with their prey more than males. This is believed to be the maternal instinct that cats have to care for their kittens. Since kittens need to learn by themselves, mother cats often bring partially live prey to kittens so that they can practice hunting. Males do not care for kittens in the same way, although they may play with flies before eating them.


Finally, the cats will also prolong their hunt to ensure they are not in danger. Although cats will try to hunt smaller creatures, some prey can cause them harm. For example, rats have sharp teeth, and bees have stings. For this reason, the cat will need to stun the prey before approaching to kill. This hesitancy can even apply to flies if the cat is not completely sure of its safety.

My cat ate a fly: Should I worry?


Cats are natural predators, and it is in their nature to hunt for prey, just as their ancestors did, and domesticated cats retain this propensity. Take, for example, your beloved cat. She will chase after every moving object she may see, even little critters like ants and spiders. Flies, grasshoppers, and even bees are among the flying animals that your cat will eagerly follow. While some cats may show their “prize” to their owners, most cats will consume their prey, particularly if it is a little fly or insect.

If your cat eats flies occasionally, there’s no need to be concerned. Cats may use catching flies as a type of exercise to improve their eye-claw coordination and excite their curious minds. If your pet cat does it regularly, though, you should take steps to prevent it. Some cats’ stomachs are sensitive, and ingesting many flies might result in vomiting, diarrhea, and a lack of appetite. Eating flies as part of her regular snacking might result in sickness and life-threatening health problems.

How to keep flies away from your cat?

Is It Okay For Cats To Eat Flies? As long as your cat sees flies fluttering and buzzing around, there’s a great possibility that she’ll keep pursuing and eating them. The best solution? Get rid of the flies!  

Here are some fool-proof ways to keep flies away from your cat and your home in general:

  • fly-proof your home by placing screens on windows and doors and by installing roof vents 
  • practice good housekeeping practices to keep flies away, such as cleaning and disposing of garbage properly and making sure that trash bins are covered well 
  • clean and dispose of pet feces and waste in your yard and home premises properly 
  • use fly traps and citronella candles to ward off flies 

How to prevent your cat from eating flies?

Aside from keeping your home and premises clean and fly-free, here are other tips to divert your cat’s attention from flies. 

  • redirect your cat’s interest to safer things to chew on by giving her toys that she can pursue to release her predator tendencies, like feather toys 
  • schedule interactive playtime with your pet cat, so she doesn’t get bored at all 
  • install a cat perch, catio, or cat shelves that she can explore so she’ll remain active and forget about going after flies

Conclusion: Can Cats Eat Flies?

Is It Okay For Cats To Eat Flies? Cats can eat various flies, and there shouldn’t be any immediate cause for alarm. However, problems could arise if your kitto snacks on more flies than it should or if the flies are contaminated with pathogens and insecticides.


Will Eating Flies Hurt Cats?
No, eating flies will not harm your cat. A cat’s stomach can eat and digest various things, including insects. However, moderate stomach pain, such as vomiting or diarrhea, and a temporary loss of appetite, may occur.
Are flies toxic to cats?
Although it is typically not detrimental to cats to eat flies, I do not advocate encouraging them to do so regularly. Having a lot of flies inside the home or in the yard may cause hygienic difficulties for people. Thus efforts to keep flies out should be made.
Can cats get worms from eating flies?
Cats may potentially get affected by consuming Isospora cyst-carrying flies or cockroaches. Isospora infections in adult cats normally cause no difficulties, but they may cause serious illness in kittens, where the coccidia can erode the gut lining and produce mucousy diarrhea.
My cat ate a fly what do I do?
Yes, eating flies may make cats ill. Keep an eye on your cat and hand-feed little amounts of wet food and water if he looks to be upset in the stomach. If your cat develops a stomach ache from eating flies, the symptoms should subside in 24 hours, and she’ll be back to her mischievous ways.

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