Get

In Your Inbox

Dogster 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 Dog Keeps Eating Flies, What Should I Do? Vet-Verified Facts & FAQ

Border Collie looking at a fly

Like all animals, dogs tend to engage in all kinds of weird behaviors, including eating flies. Some dogs simply can’t withhold the excitement that they feel when they hear the buzzing sound in the air, and they run straight to the fly, trying to either catch or eat it.

If you’re a dog parent, this behavior may concern you because flies are typically considered gross bugs that annoy us. However, many dogs consider insects to be treats, hence why they try to eat them. So, if your dog eats a fly every now and then, there’s typically no need to worry, as this behavior is entirely normal. However, beware; if your dog is air-biting or chasing imaginary flies, this is completely different and could be a sign of an underlying health problem.

Read on to learn why your dog keeps eating flies, if such behavior is safe for dogs, and if there’s anything that you should do about it.

Why Do Dogs Eat Flies?

Dogs are natural-born hunters and scavengers, so it’s in their nature to hunt, catch, and search for their prey. This also means they tend to eat all kinds of items that we may find gross. Since pet dogs typically don’t have opportunities to hunt wild animals, they will hunt insects instead, including house flies.

Chasing, hunting, and eating flies are fun for your dog because these actions are mentally and physically stimulating. Some dogs may also engage in such behaviors due to boredom or too much energy.

Dogs with high prey drive and activity levels are more prone to chasing and eating flies, though this behavior could occur in any dog. It’s also possible for dogs eating flies to be a sign of behavioral, neurological, or digestive problems. Some dogs may also eat flies simply because they like the taste!

Flies
Image By: Buntysmum, Pixabay

Is Eating Flies Safe for Your Dog?

Eating a fly every now and then shouldn’t harm your canine in any way. Many people believe that their dogs could get sick from eating a housefly due to the diseases that they can transmit. However, after a dog eats a fly, it gets digested in their digestive system, and there is no evidence that they can transmit any diseases. 

As dogs are unable to differentiate between harmless and poisonous insects, we should still keep an eye on anything your dog eats and try to deter your dog from this behavior.

How to Deter Dogs From Eating Flies

If your dog only occasionally eats flies, there’s no need to worry or try to stop the behavior. If it becomes obsessive, however, you should try to prevent this behavior. 

There are a few things that you can do to deter your dog from eating flies:

  • Provide your dog with regular exercise and mental stimulation to prevent boredom.
  • Provide your dog with fun activities, toys, and enough play time throughout the day.
  • Secure screens in your windows to prevent flies from accessing your home.
  • Train your dog to stay away from insects, including flies especially when you do outdoor activities where flies and other insects are plenty.

There’s no way to ensure that your dog will never eat another fly in their life, but it’s still important to try to reduce these behaviors to keep your furry companion happy and healthy.

dog and owner walking
Image By: Blazej Lyjak, Shutterstock

What Should You Do if Your Dog Eats a Fly?

If your dog eats flies but seldomly, there’s nothing in particular that you need to do about it. However, if you notice frequent or compulsive fly eating and chasing in your dog, it is recommended to consult with your veterinarian or animal behaviorist.

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 personalized advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content Savings V1

Frequently Asked Questions

What Are Insects That Dogs Should Never Eat?

Eating flies won’t do your dog much physical harm. However, dogs may stumble upon other insects and decide to eat them too. Consuming unfamiliar insects may lead to injuries and health problems.

Here’s a list of insects that your dog should never eat:

  • Spiders and scorpions — These insects contain venoms that are harmful to your dog.
  • Stinging insects — Some dogs are allergic to wasps and bees, which is why you should never allow your dog to eat these insects. Dogs may also get stung while trying to eat a wasp or a bee, which could be potentially dangerous for them.
  • Fireflies — These insects contain lucibufagins, a self-defense toxin almost similar to those released by toads. Its toxicity has been documented mainly in reptiles.
  • Cockroaches — These insects are not poisonous but they may carry bacteria and parasites that are best avoided in your dog.
  • Caterpillars — Processionary caterpillars can cause serious health problems to dogs if they touch, lick, or eat them. They are covered in tiny poisonous hairs that cause severe tissue damage

Is There a Cause for Compulsive Fly Eating in My Dog?

Compulsive fly-eating in your dog could be a sign of an underlying issue. Behavioral problems such as anxiety or stress and neurological disease have been described to cause fly-biting behaviors. If you notice it, you should start watching your dog closely and even install a pet camera to monitor them while you are not at home. Do not hesitate to talk to your vet if this behavior persists.

dog owner talking to vet
Image Credit: SeventyFour, Shutterstock

My Dog Is Chasing Flies That Aren’t There, What Should I Do?

If your dog is chasing flies that aren’t actually there, this may be a sign of seizures, digestive disease, or compulsive disorder. 

Chasing non-existent flies may also be a sign of syringomyelia, a neurological disorder caused by abnormal flow of cerebrospinal fluid that can be seen in brachycephalic (short-nosed) toy breeds. Some dogs may also see “phantom flies” due to eye problems or rapid eye movements.

In this situation, it’s essential to speak to your vet, who will perform further testing to see what’s happening with your furry companion.

Final Thoughts

If you see your dog chasing and eating a fly every once in a while, there’s no need to panic, as the behavior is entirely normal. However, if your dog is air-biting or snapping at imaginary flies, it is essential to speak to your vet, as it may indicate a health problem that needs prompt intervention.

Related Reads:


Featured Image Credit: 4924546, Pixabay

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* 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 Dogster 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

Away’s Pet Carrier Review 2025: An Expert’s Breakdown

What Is Away’s Pet Carrier? How Does It Work? A modern travel and lifestyle brand, Away has been bringing innovative products that solve...

What Were Bernese Mountain Dogs Bred For? History & Facts

Bernese Mountain Dogs are large, gentle dogs that make loving companions. Today, this dog is a popular choice for a family dog because...

How Do Dogs Fall Asleep So Fast? Vet-Reviewed Canine’s Sleep Cycle

Dogs have a plethora of skills and talents, but their ability to fall asleep in seconds flat is truly jealousy-inducing. How is it...

Do Newfoundland Dogs Shed a Lot? Vet-Reviewed Grooming Needs & Care Tips

According to AKC, the largest purebred dog registry in the world, Newfoundlands are among the largest dogs on the planet.1 This strikingly powerful...

More related

Male vs Female Bulldog: What’s the Difference? (With Pictures)

The Bulldog is an amazing animal. This breed originally had the difficult job of grabbing a bull by the nose and laying on...

Dog Nosebleeds: Causes & Care Guide (Vet Answer)

We all know that people can get nosebleeds for various reasons, but what about dogs? Can dogs get nosebleeds? Yes, they can. If...

How Much Does a Dog’s Ear Hematoma Surgery Cost? (2025 Update)

Ear hematomas are blood-filled pockets between the skin and cartilage of the ear flap, and they can be quite common in canines. They...

Highland Maltie (Westie & Maltese Mix): Info, Pictures, Care & More

A Highland Maltie is a mix between a West Highland White Terrier and a Maltese. They’re small, white dogs that are often confident...

Keep reading

Can Dogs Eat Teddy Grahams? Vet-Approved Facts & FAQ

Before changing your dog’s/ cat’s diet or introducing new ingredients or supplements that they haven’t eaten before, especially when it comes to human food, make sure to consult your veterinarian first. Every dog/cat is different and requires an individual approach...

Can Dogs Eat Teddy Grahams

10 Best Dental Treats for Dogs in 2025 – Reviews & Top Picks

Dental treats aren’t meant as a replacement for regular brushing, but your dog will love them, and they work as a good backup. They help remove plaque and tartar buildup, thanks to their abrasive surface, and sometimes the ingredients they...

siberian husky given a dental treat

Can Dogs Eat Pigs’ Feet? Vet-Approved Facts & FAQ

Dogs are glad to try any meaty snack you wave in their faces, but it can be tricky to tell what exactly they can and can’t eat. For instance, can dogs eat pigs’ feet? Yes, dogs can eat pigs’ feet,...

Can Dogs Eat Pigs’ Feet

11 Best Foods for Dogs with Pancreatitis in 2025 – Reviews & Top Picks

Stomach trouble is no fun for anyone, and your playful pooch is no exception. While some issues go away within a few hours, others, like pancreatitis, take longer to manage and recover from. When you’re considering which food is the...

dog eating wet food

Why Does My Dog Leave Food on the Floor? 7 Vet-Reviewed Reasons

When dogs leave food all over the floor, it can be somewhat perplexing. After all, dogs are supposed to enjoy eating their food, so why are they moving it out of the bowl to various locations around your house or...

dog eating dog food

Farmina Dog Food Review 2025: Pros, Cons, Recalls & FAQ (Vet-Approved)

Farmina Dog Food Review Summary Farmina dog food is available at retailers in the United States and Europe. Farmina is an Italian pet food company that produces three lines of dog food full of only high-quality ingredients. It’s difficult to...

Dogster_Farmina Dog Food Review

Can Dogs Eat Caviar? Vet-Reviewed Nutrition Facts

As dog owners, we want the best for our pets, including what they eat. However, some dog parents take things to the next level by offering their pups gourmet human foods, such as caviar. While dogs can occasionally eat caviar,...

Can Dogs Eat_Cassava

10 Best Fresh Dog Food Delivery Services in 2025 – Reviews & Top Picks

Dog food subscription and delivery services are a convenient way to buy food for your pet, and while they are generally slightly more expensive, they do take most of the hassle out of shopping for your pal’s meals. Luckily, there...

Finny opening the door with the farmers dog delivery