5 Best Vet-Approved Fly Repellents for Dogs in 2026 - Reviews & Top Picks

As dog owners, we know how much our dogs love to spend time outdoors. We also know that keeping fleas and ticks off of our best friend is important. But did you know that flies can also be persistent pests to your dog?

Flies like to land on your dog and bite them. They are especially drawn to open wounds, laying eggs in the wound and feeding on blood. To give your dog relief, a fly repellent is an easy solution.

With so many to choose from, it can be difficult to know which one is safe and effective for your dog. We created reviews of our favorite fly repellents to help you learn more about the products and find the one you like the best. Once you have chosen one, you can give your dog relief from these annoying critters.

Disclaimer: Always use caution and care during application to avoid contact with your dog's eyes, nose, and mouth. Do not allow your dog to lick or groom themselves after application, as they could ingest the repellant. If you notice any changes with your dog after a recent application, seek guidance from your vet.

A Glance at Our Top Picks in 2026

Rating	Image	Product	Details
Best Overall		Absorbine Ultrashield Green Fly Repellent	Eco-friendly formula Leaves coats shiny Repels several types of insects	Check Price
Best Value		Flys-Off Fly Repellent Dog & Horse	Long-lasting container Ointment allows for more precise application Keeps flies away from open wounds	Check Price
Premium Choice		Bio-Groom Repel-35 Insect Control Dog Spray	Effective against several types of insects Safe for the environment Light scent	Check Price
		Pyranha Zero-Bite All-Natural Fly Spray	All-natural Pleasant scent of essential oils Non-greasy	Check Price
		Nantucket Spider Natural Insect Repellent	Blend of essential oils No harsh chemicals Quality coverage	Check Price

The 5 Best Fly Repellents for Dogs

1. Absorbine Ultrashield Green Fly Repellent Spray — Best Overall

The Absorbine Ultrashield Green Fly Repellent Spray is safe for horses, ponies, and dogs. It’s good for multi-animal homes and will repel not only flies but also ticks, mosquitoes, and gnats. Its versatility makes it the best overall fly repellent for dogs.

The formula is eco-friendly and contains seven essential oils. The botanical scent of these oils will last in your dog’s coat, so it is important to make sure you can tolerate the smell. It leaves dogs’ coats soft and shiny.

For maximum effectiveness when spending long periods outdoors, reapply this spray every 2 hours to keep your dog fly-free. This formula is not concentrated, so it’s ready to go right from the spray bottle. This is a non-toxic option. While it’s not truly all-natural, it’s safe for use around people and animals.

2. Flys-Off Fly Repellent Dog & Horse Ointment — Best Value

The Flys-Off Fly Repellent Dog & Horse Ointment is the best fly repellent for dogs for the money. This tub lasts for a while because a little goes a long way. One perk of using an ointment instead of a spray is that you can carefully apply it around your dog’s nose and eyes without missing any spots.

The ointment can also cover the areas around open wounds, keeping flies away from them so they have a chance to heal. It will stop your dog from scratching or biting at the wounds to remove the flies. It will also keep your dog calmer and more content outside.

The biggest issue with this ointment is the smell. It’s strong, but some dog owners don’t mind it because the product works. It’s safe for use on dogs over 12 weeks old.

3. Bio-Groom Repel-35 Insect Control Dog Spray — Premium Choice

The easy-to-use Bio-Groom Repel-35 Insect Control Dog Spray is effective against flies, mosquitoes, and gnats. It offers protection against fleas and ticks. It can also be used on horses.

The water-based formula is gentle on dogs with sensitive skin. It’s non-irritating and includes lanolin and aloe for nourishing moisture. This makes it safe for regular use. It has a light scent and offers 35 days of protection against insects.

Bio-Groom products are safe for animals and the environment. However, it is water-based and must be reapplied after the dog goes swimming or is out in the rain. Some dog owners noticed the protection wore off after 14 days instead of 35.

4. Pyranha Zero-Bite All-Natural Fly Spray for Dogs

The Pyranha Zero-Bite All-Natural Fly Spray can be used on dogs, cats, and other small animals. It repels various flies using natural ingredients, making it a safe alternative to harsh fly sprays that use strong chemicals. The spray also repels mosquitos, fleas, gnats, and lice.

The water-based formula combines clove and peppermint oil to repel insects, but it won’t leave your dog’s coat feeling oily or greasy. It dries quickly.

The smell of essential oils can be overwhelming, but it fades over time. The product starts to foam when it’s sprayed. The foam then goes away as the liquid settles into the dog’s coat.

5. Nantucket Spider Natural Insect Repellent

The Nantucket Spider Natural Insect Repellent uses essential oils to repel flies, ticks, mosquitos, and other pests. Rosemary, thyme, peppermint, cedarwood, and geranium oils keep insects off your pup naturally without any harsh chemicals.

The fine mist sprayer offers quality coverage with every spray. Your dog won’t be soaking in this repellent, but it will form a nice barrier on their coats to ward off flies. This spray can also be used in kennels, dog houses, and dog beds to keep insects away.

The smell can be overwhelming to some dog owners. If essential oils aren’t something that you enjoy, this won’t be the product for you.

Buyer's Guide: How to Pick the Best Fly Repellent

What to Look For in Fly Repellents for Dogs

Understanding what’s in fly repellents will help you choose one that will suit your dog’s needs.

Eco-friendly Repellents

Eco-friendly sprays tend to use natural ingredients like lemongrass and citronella. They’re non-toxic and safe to use around people and animals besides dogs. These sprays leave behind a long-lasting scent that you may or may not find pleasant.

Pesticides

Repellents containing pesticides will repel and kill insects, but these are not ideal for dogs because they lick themselves. These products should not be used on dogs.

Ointment vs. Spray

If you want to give your dog a quick layer of protection before they spend time outdoors, sprays work well. Sprays don’t cover targeted areas, though; they can’t be sprayed around the eyes or nose or on open wounds.

Ointments enable you to get close to your dog’s eyes and around their nose with more precision. You can put the product exactly where you want it to go. Ointments also last longer because they absorb into the skin. They are more effective at keeping flies away from open wounds.

Why Are Flies on My Dog?

Flies are drawn to dogs for various reasons. If your dog has a dirty coat or a bit of poop stuck in their hair, flies will be able to detect that in a second. Open wounds are also attractive to flies, so if your dog has a scratch or injury, make sure to keep the flies away. They will feed off the wound and lay their eggs in the tissue.

Some flies can bite your dog, which is not only painful for them but also could lead to infections. Flies can also transmit disease. They land on anything that they find, including piles of dog poop. They can then fly directly from the poop to your dog, spreading bacteria.

How Can I Keep Flies Away?

In addition to using repellents on your dog, you can use them around your yard. If you spray pesticides around your home, keep all animals and children away from the area until the product is completely dry.

Remove anything that the flies are attracted to. Keep your yard clear of dog poop. Secure trash can lids. Pick up trash and remove any piles of rotting organic matter. Standing water should be removed to keep flies and mosquitos away.

Flies may occasionally come into your yard, but if there’s nothing there for them to enjoy, they won’t stick around.

If there are still flies on your dog after using repellents, speak to a vet for advice.

How We Selected These Fly Repellents for Dogs

This buyer’s guide was carefully crafted by our writers and editors in collaboration with our team of in-house veterinarians. The fly repellents for dogs reviewed here are rated on a combination of factors: brand reputation, customer reviews across multiple retail outlets, personal experience, and in some cases, feedback from our own dogs! Together, we choose and review only the best fly repellents for dogs available, to help you make the most informed decisions that foster the well-being of your furry friends.

Why Trust Dogster?

Dogster has been a trusted brand for dog owners online since 2004, which means we have a lot of experience with fly repellents for dogs. We are a team of passionate dog owners who care about our pups as much as you do yours. We want the best for every canine on the planet. Dogster’s writers, editors, and veterinarians are deeply invested in the well-being of our pets, and we believe that all pet owners share this dedication to providing only the highest quality products and services for our dogs.

Conclusion

Our best overall choice of fly repellents for dogs is Absorbine Ultrashield Green Fly Repellent Spray. It’s eco-friendly and repels several insects, but the smell can be overwhelming. For a budget option, we like Flys-Off Fly Repellent Dog & Horse Ointment. It helps you apply the product with more precision around eyes, noses, and open wounds. We hope our reviews have helped you decide on the right fly repellent for your dog.

Featured Image Credit: mferman24, Pixabay