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If you’re a horse owner, you’ve likely faced the inconvenient flying pests that are mosquitoes and flies. Thankfully, there’s a great way to prevent these animals from approaching your horse. All you need to do is apply this once and let your horse get going. Such sprays are highly efficient when it comes to keeping pests away from your horse.

You can get a regular spray bottle if you’re spraying one or two horses, or an aerosol-type spray if you own more than three. We’ve researched and found many different types of fly sprays out there. With so many options on the market, deciding on which one to get can be quite frustrating.

Best Fly Sprays for Horses

1. Farnam Companies 100502139 – Best Overall

We recommend that you give this spray a try if you own a large amount of livestock. It doesn’t matter which type of animal you have, this product does a great job of keeping them safe from mosquitoes, gnats, and lice.

The product has been effectively tested in different breeds of donkeys and horses, making it a versatile option to keep around your farm.

The formula is mixed with a special conditioner, preventing the sweat of your horses to hinder its effectiveness. This does wonders as well if you keep your horse in an environment plagued with small animals – it should keep them away without making your horse feel uncomfortable because of its smell.

You don’t need to apply the spray too often. The formula is effective enough to last for at least five days without having to worry about reapplying.

It’s pretty harmless as well – you don’t have to worry about it affecting your stallions or their surroundings. The components are pretty natural, and although free of harmful chemicals, they do have a good level of effectiveness.

Do keep in mind that the bottle is pretty small, considering its price. Although quality is almost guaranteed with this purchase, you’ll be paying a bit more than you would for other products. If you only own a single pony this isn’t a big deal, but keep it in mind if you work with a lot of livestock on a daily basis.


  • You don’t need to reapply the product too often
  • Harmless to the horse and its surroundings
  • It does a great job at protecting livestock in general
  • Works even if the horse is active by nature
  • It doesn’t come off with the sweat of your livestock


  • Pretty expensive
  • Although the product is powerful, the bottle is a tad small

2. Farnam Repel-Xp Emulsifiable Fly Spray – Best Concentrate

Although this isn’t a ready-to-use spray, this product is still a very powerful concentrate which you can use to create up to one gallon of cheap fly spray for horses. You can mix it with many other natural (or chemical, up to you) products of your liking, just be sure to inform yourself well before wasting this concentrate in a bad mix.

It also has a very good price considering how much concentrate you get, and also how much spray you can create out of it. The bottle is very easy to pour into a bottle of spray, even in a big size, so mixing formula shouldn’t be a problem at all.

The products that we’ve reviewed are more effective than this one, but the others can’t match Farnam’s price. It does a great job at keeping flies away from horses – particularly the bigger ones! If you own large stallions, you might want to consider using this concentrate to create a spray for them. It works well with small horses as well, but you could use other products for them.

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If you do intend to use it with mini horses, make sure not to create a powerful formula – it’d be overkilling it.


  • Ideal product to keep large horses from flies
  • Can be easily poured into a bottle of spray
  • You can make up to one gallon of spray formula with the concentrate
  • You can freely mix it with different products to tweak the formula to your liking


  • It’s not as powerful as other products we’ve reviewed
  • You can use it directly. It needs to be mixed.

3. Espree Aloe Herbal Fly Repellent Horse Spray – Best Organic Spray Concentrate

Although we’ve shown you two fully natural products already, we’ve picked this concentrate because of the specific natural components that it has. The product is made with essential oils, a one-of-a-kind formula when it comes to horse sprays.

Its main component is Aloe Vera, and it also has sunscreen to better protect your horses when they’re out in the pasture. This spray is also great for keeping the skin of your horses in good condition. This is in part due to its integrated sunscreen formula, but also because of the properties of the Aloe Vera itself. The coat conditioners are also great for their fur.

The spray itself has a very pleasant smell. It does an amazing job at killing flies, and it keeps them away for a good amount of time after it’s applied.

The concentrate has been tested as well – the best way to use it is by mixing it in a ratio of 4 to 1. The product itself suggest you do it in a higher ratio, but it won’t be as effective if you follow the instructions too closely.


  • This is one of the few repellents made with essential oils and herbs
  • You can make up to 4 gallons of very effective spray with it
  • It can keep your horse healthy while they’re exposed to the sun
  • Revitalizes your horse’s fur


  • It’s extremely expensive
  • Farnam products are more effective

4. Farnam Home and Garden Bronco Equine Spray with Citronella – Best Combo

As you’ve probably realized by now, Farnam makes some of the finest fly sprays for stallions on the market. This combo comes with three leak-proof spray bottles at a very decent price. As most Farnam products, it’s advertised as a repellent for horses but it works very well with other animals – even small creatures like dogs and pigs.

The results can be noticed as soon as you apply this product. Its effectiveness seems unquestioned even in large areas such as backyards or wide fenced fields. The one main issue with this repellent is the smell; it produces a very distasteful odor which doesn’t affect your horses and other pets, but it can be very displeasing for you.

You also have the option of purchasing a whole gallon of the product, allowing you to fill other spray bottles as you see fit. It’s not as expensive as other sprays either!


  • The spray bottles are very efficient
  • It works on small and big pets alike
  • Keeps flies, lice, chiggers, and mosquitoes off your horses
  • It’s very efficient in large areas


  • It smells pretty badly
  • Not as effective of the other two Farnam products in our list

5. UltraCruz Equine Natural Fly and Tick Spray for Horses – Best Natural Spray

If you’re looking for a spray made solely with natural ingredients, this is the ideal product for you. It lacks any type of added chemical, and it also smells pretty good. If you tend to be let down by strong smells, this product should be exactly what you’re looking for. It only affects small insects and flies, so forget about your horses feeling discouraged by it.

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This natural spray works even better in wooded areas than anywhere else. If your horse tends to frequent forests (or if your stallion lives in an area with a lot of trees), keep this product in mind when you make your purchase.

It’s well-equipped to fight a fly past, but it will do an amazing job at cleansing your horse from ticks and lice as well.

There are some issues with this spray, though. If you use it for a long time in the same area, flies and ticks might develop a resistance to it, rendering the product useless. If you get this spray, you might want to move your horse around different areas when you take them to their pasture. It works on humans as well!


  • Works in horses as well as in humans
  • Ideal to be used in wooded areas, but it works in any type of pasture
  • Great at killing flies, but especially ticks
  • It’s entirely made of natural components


  • If you tend to take your horse to the same area, the ticks there might develop a resistance
  • It’s not too effective on other animals. Use it mainly in horses


What You Should Know Before Purchasing a Fly Spray for Horses

best fly repellent for horse stallsApart from the features that we’re about to mention, you have to be aware that applying one of these products might not be enough to keep your horse rid of flies, lice, and chiggers.

You have to bathe them as much as possible and take good care of their fur and skin. As a horse owner, you probably already know how much care these animals require. These products can be very beneficial for their overall well-being, and they should be used to complement their skin health alongside other care that you give them.

Product Properties

Some of these fly sprays for horses offer more than simple repellent attributes. For example, the Espree Aloe Herbal Fly Repellent makes for a great skin nourisher.

Depending on the type of components with which the products is made, it’ll have different effects on your horse and on their skin. If you’re looking for a simple repellent, don’t read too much into this… But keep in mind some of these additional attributes are often very good for your horses.

Lack of Chemicals

It’s important for these products to be as chemical-free as possible. Chemicals can be very harmful to your horse’s health – and even to your own. Make sure the product isn’t a health hazard. Sometimes it is worth spending a couple of additional dollars on a more natural product; these can be a bit more expensive, but they are more beneficial for your horse’s health.


You have to find the perfect balance between price and effectiveness. If you find a cheap product but it has to be applied constantly, it’s going to end up being more expensive than others in the long run.

On the other hand, some of the products we reviewed today might seem a bit expensive, but they remain effective for a long time on your horse.

Active Ingredients

When it comes to fly sprays for horses, active ingredients may differ widely from one product to the other.

That’s why you need to take the time to check out what type of active ingredients a fly spray contains. This is very important given that ingredients determine how a certain spray reacts with your horse.

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Pay particular attention to the period of effectiveness and reaction to the environment. For instance, if you’d like to give a non-toxic yet effective treatment to your horse, you will need to go for natural repellents.

Also, it is important to point out that these sprays aren’t favorable for all horses. For example, they are not suitable for foals and lactating mares.

The Individual Needs of Your Horse

Take into account your horses’ skin when looking for a fly spray. If your horse suffers from open wounds, a health issue, or has very sensitive skin, then you should be cautious when picking a spray.

It is a good idea to test a fly spray on a smaller patch of your horse’s skin to get a better idea of how your horse is likely to react. If you notice any adverse reaction, be sure to consult your veterinarian.

Frequently Asked Questions

Q: How Often to Apply the Fly Sprays for Horses?

A: If you can’t reapply frequently for some reason, it’s best to choose an oil-based fly spray. It’s going to last longer and do a good job as well.

According to manufacturers, their fly sprays for horses can last for 10-14 days. However, in reality, these provide protection for two or three days only. That’s why the spray you select should be tested in air-conditioned rooms without the impact of weather conditions.

Regular application is vital anyway. It is particularly important when it comes to water-based fly sprays. It’s critical to make reapplication, as these sprays don’t stay on the horsehair quite as well.

Q: Are Horse Fly Sprays Safe for Humans?

A: Fly sprays for horses are safe for humans when used at the recommended concentrations. Unlike pyrethroids, they are not toxic to pets and fish. Nonetheless, you are advised to read warning label of a fly spray before starting to spritz your horse with it, just in case.

Q: What Essential Oils Can Repel Horse Flies?

A: Not every essential oil is capable of keeping the horse flies away. You should go for natural oils that are proven to repeal horse flies. For best results, you will need to combine the following essential oils:

  • Eucalyptus
  • Citronella
  • Lemon Grass
  • Cedarwood
  • Peppermint
  • Lavender
  • Tea Tree

The best fly sprays for horses include these essential oils. So be sure to check the ingredients before purchasing one for your horse. If you want a natural spray without chemicals, look for above-mentioned essential oils in the ingredients.

Q: Why Do These Sprays Kill Flies?

A: Fly sprays are chemical insecticides that come in an aerosol. They are intended to kill flies when sprayed all over the horse.

In addition to house flies, these sprays can kill other insects like wasps and mosquitoes. The effectiveness of a horse spray depends largely on the active ingredients it contains.

Ready to Help Your Horse Avoid These Pesky Insects?

All of these products are very well capable of keeping flies and other small creatures away from your horse.

Thoroughly evaluate what you’re expecting from your fly spray for horses before making your purchase and make sure that it offers exactly what you and your horse require. Some sprays need to be applied on a daily basis, while others will remain active for up to 5 days after you apply them.

It’s up to you how much you use them and how powerful you make each spray if you’re planning to buy a concentrate. Be sure to wash your horse before applying them! It can make the product act much better that way.