8 Best Horse Fly Repellent [2021 Reviews]

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Horse Fly Repellent Horses often spend their time outdoors, which makes them a target for insects – especially flies. While they have their mane and tail as protection, it may not be enough when the infestation is severe. Aside from flies, there are also other pests, such as mosquitoes, and gnats, that can ruin their day.

Therefore, as the owner or caretaker of your equestrian friend, it pays to invest in the best horse fly repellent. Your horse will thank you if they are constantly kept away from pesky flies.

8 Horse Fly Repellent Reviews

Here are our top picks for the best horse fly repellent:

1. HARRIS Happy Horse Neem Oil

If you want something organic for a horse fly repellent, why not try the HARRIS Happy Horse Neem Oil? This one is cold-pressed and unrefined, making it a herbal and organic-grade topical oil that is safe to apply to horses. It is made without additives or chemicals so that the neem plants keep their original natural composition.

Each bottle is at 12 ounces and it can be mixed with any shampoo, lotion, or other fly sprays that you have to increase its efficiency. What’s more, this topical application is also gentle on your horse’s skin.

It doesn’t just keep flies away but it also helps with free radical damage so that your horse will have a soothing sensation from inflammations and the like. Moreover, the manufacturer has a satisfaction guarantee return program if you are not completely happy with your purchase.

The cold-pressed neem oil is unlike the low-cost hydrophobic and azadirachtin, which are processed ones, so this one is more likely to be effective.


  • Organic and natural neem oil
  • Soothes your horse’s skin
  • Keeps away flies instantly
  • Can be mixed with lotion and other sprays
  • May help with free radical damage


  • May settle in cold temperatures
  • May have a strong odor


2. Farnam Endure Sweat-Resistant Fly Spray for Horses

Ideal for up to 14 days of protection, the Farnam Endure Sweat-Resistant Fly Spray for Horses is a good choice for those with multiple horses in their stable or farm. This horse fly repellent has a sweat-resistant formula so it will work to ward off flies, gnats, mosquitoes, deer ticks, and lice even if your horse runs off the field.

Each spray contains 1 quart and it has a spray head that’s easy to use. Because it is applicable for all life stages, it is ideal for multi-horse stables or farms. Due to the inclusion of the RepeLock conditioner, it won’t drip off even when your horse sweats. That’s because this conditioner binds to the hair shaft of the horse.

If Lyme disease is a common problem in your neighborhood, this fly repellent would be ideal for your equestrian friends. It also comes with diluting instructions to avoid applying too much for your horse.


  • Repels flies and even other insects
  • For all life stages
  • Sweat-resistant
  • Has a pump spray


  • A bit on the pricey side
  • May have a strong smell


3. Farnam Bronco e Equine Fly Spray with Citronella Scent

If you want the best horse fly repellent without a strong smell, the Farnam Bronco e Equine Fly Spray with Citronella Scent is for you. This one is made for both horses and ponies due to its safe formula yet it kills and repels flies, gnats, lice, fleas, ticks, mosquitoes, and many others.

Since it is water-based, it is not too strong and it even has a citronella scent that won’t put you off easily. Moreover, this container has 1 gallon, which is sufficient for large barns even as a premise spray. This allows you to spray on the stall even without the horse around to keep flies at bay.

Among the effective ingredients are Prallethrin, Permethrin, and Piperonyl Butoxide, which act to repel flies of many types, including house, horn, face, horse, and stable. Since it is ready to be used, there’s no need to dilute it to use it directly for your horse or stable.


  • Works on 6 types of flies
  • Ideal for large barns
  • Can be used as a premise spray
  • With citronella scent
  • No need to dilute


  • You have to buy a spray bottle separately
  • Minor delivery issues


4. Absorbine UltraShield EX Fly Spray

For extreme cases of fly infestations, the Absorbine UltraShield EX Fly Spray is a good horse fly repellent for your stable. Because it is a water-based formula, it can be used as a barn premise spray that will last for a long time. Due to UltraBond technology, it is sweat-proof and rain-proof.

Up to 70 species of flies, mosquitoes, gnats, and ticks are killed and repelled by this powerful formula. Because it will last up to 17 days, it will be a great spray for protection even when your horses do their job. Moreover, it has a couple of sunscreens and coat conditioners.

Each container has 1 gallon, which contains active ingredients, such as aloe and lanolin. These ingredients are naturally-derived and will also help smoothen and condition your horse’s skin and coat. Among its active ingredients include pyrethrins, which are fly repellents. We like that this formula is weatherproof so even if your horse has been rained on, the fly repellent will still be active.


  • Rain-proof
  • Sweat-proof
  • Has natural sunscreens
  • Can be used as a premise spray
  • Water-based formula


  • A bit on the pricey side
  • Doesn’t come with a spray pump


5. Farnam 3005682 Bronco Gold Horse Fly Care

Yet another horse fly repellent that comes in a gallon container is the Farnam 3005682 Bronco Gold Horse Fly Care. This one will take out stable, horn, house, face, horse, and deer flies and keep them away for good.

Aside from that, it will also target mosquitoes and gnats, leaving your horse pest-free. Among its active ingredients are pyrethrins, pipepronyl butoxide technical, and butoxypolypropylene glycol, which are commonly seen in fly repellents.

Due to its strength, it is a well-renowned fly repellent for extreme infestations. Moreover, when you apply the product safely to your horse, it also has conditioning properties that will make their mane and tail shiny, sleek, and moisturized. It also has moisturizing capabilities on the hoofs.

With this formula, a little goes a long way so it is intended for large stables and barns. Even just using below the recommended amount is okay for regular use to keep the flies away.


  • Has a strong formulation
  • Great for large barns
  • A little goes a long way
  • Targets both flies and other pests


  • A bit on the pricey side
  • Container design issues


6. Pyranha Nulli Fly Spray Gallon

One of the most well-renowned horse fly repellents out there in the market would be the Pyranha Nulli Fly Spray Gallon. Containing fly-killing ingredients such as Permethrin, Pyrethrins, and Piperonyl Butoxide, this one will target all kinds of flies, which include stable, face, deer, horse, horn, and house flies.

In addition to that, it is also good at getting rid of gnats and mosquitoes that linger around your horse. Because it is citronella-scented, you won’t be put off by a harsh chemical smell. Each container has 1 gallon and can be used with your spray bottle. Moreover, the scent doesn’t put off horses so some may even like it when you spray it on them.

Because this is a water-based insecticide, it is not going to attract dust as compared to oil-based products. In some cases, it can also target ticks, lice, and gnats when sprayed on other animals around the barn.


  • Water-based formula
  • Targets all kinds of flies
  • Citronella smell
  • Will also eliminate other pests


  • Doesn’t come with a spray bottle
  • Slightly pricier than other horse fly repellents


7. Farnam Equisect Fly Repellent

If you want a product that is ready to be used the Farnam Equisect Fly Repellent is a good choice for the best horse fly repellent. Made with a water-based and alcohol-free formula, this one is gentle on your horse’s skin due to that formulation. It is also formulated for horses with sensitive skin without attracting dust and dirt.

In addition to that, it will also deal with ticks and fleas, aside from flies and other pests. Moreover, it contains the proprietary PyGanic botanical repellent, which is an eco-friendly way to deal with these annoying pests.

What’s more, it is a mix of nature-friendly ingredients, such as corn mint, clove stem, and citronella essential oils. This means that you are spraying an insect repellent to your horse that’s not made with artificial chemicals. Every single spray comes in a 32-ounce bottle. If you are sensitive to harsh smells then this one has a fresh herbal fragrance while being sprayed.


  • Water-based formula
  • Doesn’t feel sticky
  • Natural ingredients
  • Ideal for horses with sensitive skin
  • Has a fresh herbal scent


  • Minor packaging issues
  • Not as powerful as other chemical repellents


8. Farnam Repel-X pe Emulsafiable Fly Spray for Horses

If you prefer to mix different horse fly repellents to work with large barns, the Farnam Repel-X pe Emulsifiable Fly Spray for Horses is a good choice for you. This one targets all kinds of flies, as well as gnats, ticks, and mosquitoes without question since it is a combination of Prallethrin and Piperony Butoxide – two powerful active ingredients that will take out pests.

Each pint of this concentrate will make a gallon of finished spray so you get more for little amounts. Moreover, this fly spray for horses is ideal and applicable to all horse ages. It comes in a 32-ounce gallon but you can also order 16-ounce ones and a gallon.

Since it kills on contact, it will be advisable for barns with lots of flies and pests all the time. Because it is a concentrate, it will make 8 quarts of spray with 1 quart of the formula, which makes it almost ready to be used.


  • Highly concentrated
  • A little goes a long way
  • Powerful formula
  • Targets all kinds of flies


  • Has a strong smell
  • The container is prone to spillage


Things to Considered Before Buying Fly Spray

Keeping your equestrian friend away from flies is a tough job, but here are the things to look for when you want to choose the best horse fly repellent:

  1. Efficiency. A horse fly repellent that contains a couple of chemicals is most likely going to work better than others. It is tricky to find out which one is the best but highly-concentrated formulas are the ones that have an edge over the pre-mixed ones. You may also save money with concentrated versus pre-mixed formulas.
  2. Method of application. It’s up to you whether you want to go with a horse fly repellent that is ready to be used, such as those in spray pumps, or whether you have your spray bottle or large dispenser and you only need to mix gallons.
  3. Weather-resistant and sweat-proof. Consider a horse fly repellent that is resistant to weather, such as rainfall and sweat. This means that the formula will last longer than you think it should – up to 10 days or more.
  4. Water-based formula. A horse fly repellent that has a water-based formula has a less sticky feel so dirt won’t easily cling onto your horse.
  5. Instructions on how to use. Make sure that the horse fly repellent has instructions on how to use onto your horse for safety.
  6. Eco-friendly ingredients. We also like horse fly repellents that are made with citronella and other natural ingredients, such as neem.



In the long run, buying the best horse fly repellent will help your horse stay healthy and away from skin diseases and other illnesses that can come from flies and similar pests. By keeping them protected outdoors with a strong yet skin-friendly fly repellent, you’ll feel at ease with their condition outdoors. We hope you found our top picks useful!