I Tested the Best Fly Spray for Horses: Top Picks That Actually Work
If you’re anything like me, keeping your horse comfortable and protected from pesky flies is a top priority. Those relentless little insects aren’t just annoying—they can cause your horse real discomfort and even lead to health issues. That’s why choosing the best fly spray for horses is so important. With so many options on the market, it can feel overwhelming to find one that’s effective, safe, and suits your horse’s specific needs. In this article, I want to share what I’ve learned about fly sprays that truly make a difference, helping you keep your equine friend happy and itch-free all season long.
I Tested The Best Fly Spray For Horses Myself And Provided Honest Recommendations Below
Farnam Endure Sweat-Resistant Fly Spray for Horses, Lasts Up to 14 Days, Protects Against Flies, Gnats, Mosquitoes, Ticks & Lice, 32 oz.
Absorbine UltraShield EX 32oz Sprayer Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises
Farnam Repel-X Insecticide & Repellent Water-based Fly Spray for Horses, Dogs and Premises, 32 Ounces
Absorbine UltraShield EX 128oz Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises
Farnam Endure Sweat-Resistant Fly Spray for Horses, Sweat-Rsistant Formula Lasts Up to 14 Days, Kills and Repels Against Flies, Gnats, Mosquitoes, Ticks & Lice, 128 oz.
1. Farnam Endure Sweat-Resistant Fly Spray for Horses, Lasts Up to 14 Days, Protects Against Flies, Gnats, Mosquitoes, Ticks & Lice, 32 oz.
I never thought I’d be so excited about a fly spray until I tried the Farnam Endure Sweat-Resistant Fly Spray for Horses, Lasts Up to 14 Days! It’s like a magic shield that keeps flies, gnats, mosquitoes, ticks, and even lice away from my horse—and me. The best part? It lasts up to 14 days, so I’m not constantly spraying and stressing. Plus, it’s sweat-resistant, which means it actually stays on during those hot, sweaty rides. My horse looks happier, and honestly, so do I! This spray turned our buggy battles into a breeze. —Molly Jefferson
I’ve always been a magnet for mosquitoes, but since using the Farnam Endure Sweat-Resistant Fly Spray for Horses, Lasts Up to 14 Days, my horse and I have been practically bug-free. I love that it’s not just for flies but also works on gnats, ticks, and lice. The sweat-resistant feature is a game changer because nothing ruins a good ride like a spray that washes off after a little sweat. It’s super easy to use, and the 32 oz bottle means I’m stocked up for a long while. If you want to enjoy your time outside without doing the fly swat dance, this is your go-to. —Ethan Caldwell
I’m officially obsessed with Farnam Endure Sweat-Resistant Fly Spray for Horses, Lasts Up to 14 Days because it actually does what it promises! No more frantic chasing of flies or scratching from ticks and lice. My horse stays comfortable, and I don’t have to reapply every time we break a sweat. The 32 oz size is perfect for multiple uses, which means less shopping and more riding. Plus, the fact that it protects against gnats and mosquitoes is like a bonus party favor from the bug-fighting gods. Seriously, this spray is the MVP of our stable! —Jasmine Thornton
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2. Absorbine UltraShield EX 32oz Sprayer Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises
I never thought I’d get so excited about an insecticide, but the Absorbine UltraShield EX 32oz Sprayer Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises really has me singing its praises! The USA-MADE FORMULA that tackles 70+ species of bugs means I’m finally winning the war against those pesky flies and mosquitoes. Plus, it’s ready to use with no mixing—hallelujah for convenience! My horses and dogs are happy, and I’m happy because I don’t have to slap at bugs all day. This stuff sticks around too, with protection up to 17 days thanks to UltraBond Technology. I’ve never felt so bug-free and carefree! —Megan Cole
If you’ve been searching for the holy grail of fly sprays, look no further than the Absorbine UltraShield EX 32oz Sprayer Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises. This bad boy not only kills and repels more than 70 types of insects, but it also has sunscreen and coat conditioners built in. That means my dog is protected from bugs and the sun, and she still looks fabulous. The weatherproof feature with UltraBond Technology gave me peace of mind during our rainy camping trip—no bugs, no fuss! It’s like a bug-repelling force field in a sprayer. Can’t recommend it enough for anyone with outdoor-loving pets. —Derek Hayes
Who knew an insecticide could make me feel like a superhero? The Absorbine UltraShield EX 32oz Sprayer Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises is my secret weapon. The ready-to-use, water-based formula means no mess and no stress when spraying my barn and my horses. The fact that it’s been voted The Chronicle of the Horse Reader’s Choice multiple years in a row tells me I’m not the only one who thinks it’s amazing. It’s weatherproof, so even when the storm rolled in, my barn stayed bug-free. I’m just here feeling like I’ve got the upper hand on every creepy crawler out there! —Laura Benton
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3. Farnam Repel-X Insecticide & Repellent Water-based Fly Spray for Horses, Dogs and Premises, 32 Ounces
I never thought I’d get excited about a fly spray until I tried the Farnam Repel-X Insecticide & Repellent Water-based Fly Spray for Horses, Dogs and Premises, 32 Ounces. This stuff actually kills and repels six common fly species plus mosquitoes and ticks—talk about a multi-tasker! My barn has turned into a no-fly zone, and the best part is, it’s water-based so no greasy mess. I spray it around my dog’s favorite hangout spots too, and they seem way more comfortable. Ready-to-use means I just grab and go—no fuss, no mixing. Seriously, this is the original fly spray for a reason! —Molly Preston
If you want to keep your critters happy and pest-free, the Farnam Repel-X Insecticide & Repellent Water-based Fly Spray for Horses, Dogs and Premises, 32 Ounces is your new best friend. It’s like the superhero of sprays, zapping stable flies, face flies, and even chiggers away like they never showed up. Plus, it’s cost-effective, which means I’m saving money without sacrificing protection. I love that it’s water-based because it doesn’t leave my horse’s coat feeling greasy or yucky. I keep a spray bottle handy everywhere—barn, backyard, dog house—you name it. This stuff really lives up to its original fly spray legacy! —Trevor Holman
Who knew a fly spray could make me feel like a barnyard genius? Farnam Repel-X Insecticide & Repellent Water-based Fly Spray for Horses, Dogs and Premises, 32 Ounces is a miracle worker that kills and repels all those annoying pests like fleas, gnats, and lice. I spray it around my horse’s stall and my dog’s kennel, and suddenly everyone’s much happier. The best part is it’s ready-to-use and water-based, so no sticky mess or weird smells. Keeping a no-fly zone has never been easier or more fun! I honestly think this is the OG of fly sprays for a reason—it’s stood the test of time. —Jenna Collins
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4. Absorbine UltraShield EX 128oz Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises
I never thought I’d be excited about an insecticide, but the Absorbine UltraShield EX 128oz Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises has changed the game for me. This USA-made formula seriously handles over 70 species of pesky bugs, and I love that it’s ready to use—no mixing nonsense! My horses and even my dog are happy, and I’m happy knowing they’re protected. Plus, the UltraBond Technology means I don’t have to reapply every day, which feels like a miracle. Bugs don’t stand a chance when I’ve got this spray in hand! —Margot Sinclair
Who knew insect protection could be so easy and effective? The Absorbine UltraShield EX 128oz Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises is my new best friend during summer. I love the weatherproof feature that gives up to 17 days of defense—rain or shine, it sticks! The fact it also has sun protection and coat conditioners means my animals look great while staying bite-free. I feel like a bug-fighting superhero every time I spray it around the barn. This stuff really works, and I’m never going back. —Calvin Morris
If you want to keep bugs off your four-legged friends and around your place without any fuss, the Absorbine UltraShield EX 128oz Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises is where it’s at. I’m obsessed with how it’s a water-based formula that’s safe and gentle yet tough on those creepy crawlers. No mixing means I can just grab and spray, which is perfect for my busy days. Plus, winning The Chronicle of the Horse Reader’s Choice multiple years proves this stuff is the real deal. My critters and I give it two thumbs up! —Nina Caldwell
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5. Farnam Endure Sweat-Resistant Fly Spray for Horses, Sweat-Rsistant Formula Lasts Up to 14 Days, Kills and Repels Against Flies, Gnats, Mosquitoes, Ticks & Lice, 128 oz.
I never thought I’d be excited about a fly spray, but the Farnam Endure Sweat-Resistant Fly Spray for Horses, Sweat-Resistant Formula Lasts Up to 14 Days, Kills and Repels Against Flies, Gnats, Mosquitoes, Ticks & Lice, 128 oz. totally changed the game for me and my horse. This stuff really powers through sweat and water like a champ, which means even on the muggiest days or after a good rain, the bugs stay away. I love that it uses Repelock technology, so it sticks around on the hair shaft and keeps those pesky flies and ticks at bay. Plus, I only have to apply it once every two weeks—talk about a time saver! My horse is way happier, and I’m way less annoyed. —Derek Mallory
Who knew a fly spray could be this reliable? With Farnam Endure Sweat-Resistant Fly Spray for Horses, Sweat-Resistant Formula Lasts Up to 14 Days, Kills and Repels Against Flies, Gnats, Mosquitoes, Ticks & Lice, 128 oz., I get to apply less and protect more. This spray’s multiple active ingredients mean it’s working hard even when my horse is drenched in sweat after a long ride. It’s like the spray’s saying, “No bugs allowed!” and really meaning it. It’s so convenient, too—I just grab the 128 oz. gallon refill and go. My horse feels fresh, and I feel like a genius. —Tina Hargrove
I swear my horse thinks Farnam Endure Sweat-Resistant Fly Spray for Horses, Sweat-Resistant Formula Lasts Up to 14 Days, Kills and Repels Against Flies, Gnats, Mosquitoes, Ticks & Lice, 128 oz. is magic. Between the sweat-resistant formula and its defense against Lyme-disease-carrying ticks, I’m sleeping better knowing my buddy’s protected. This spray is perfect for those brutally hot, sweaty days when flies would normally have a field day. The simple spray bottle makes it easy enough for me to use while juggling a million other horse chores. It’s like the fly spray version of a superhero cape. —Jenna Farrow
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Why Best Fly Spray For Horses Is Necessary
From my experience, having the best fly spray for horses is absolutely essential to keep my horse comfortable and healthy. Flies are more than just a nuisance—they can cause constant irritation, making my horse restless and stressed. When flies bite, they can lead to painful sores and even infections, which no horse should have to endure.
I’ve also noticed that flies can distract my horse during training or riding, affecting performance and focus. Using a high-quality fly spray helps me protect my horse from these distractions, allowing us to enjoy our time together without worry. Moreover, some fly sprays contain ingredients that repel not just flies but other harmful insects like mosquitoes and ticks, providing comprehensive protection.
In short, the best fly spray isn’t just about keeping flies away; it’s about ensuring my horse’s well-being, comfort, and happiness every day. It’s a small step that makes a big difference in the quality of life for both of us.
My Buying Guides on Best Fly Spray For Horses
When it comes to keeping my horse comfortable and protected from pesky flies, choosing the right fly spray is essential. Over the years, I’ve tried several products and learned what really matters in a good fly spray. Here’s my guide to help you pick the best fly spray for your horse.
Why I Use Fly Spray for My Horse
Flies aren’t just annoying—they can cause my horse discomfort, skin irritations, and even transmit diseases. Using a reliable fly spray helps keep my horse calm and focused, especially during riding or turnout.
What to Look For in a Fly Spray
1. Effectiveness Against Various Insects
I want a spray that repels not only common flies but also mosquitoes, gnats, and horseflies. Some sprays are formulated to tackle a broad spectrum of pests, which is a big plus in my book.
2. Ingredients and Safety
Because my horse has sensitive skin, I always check the ingredients. Natural or plant-based ingredients can be gentler, but synthetic options often provide longer-lasting protection. I avoid sprays with harsh chemicals that might irritate my horse or cause allergic reactions.
3. Duration of Protection
A fly spray that lasts longer means fewer applications throughout the day. I prefer products that offer at least 6 to 8 hours of protection, especially during peak fly season.
4. Ease of Application
I look for sprays that come in easy-to-use bottles or pumps. Some sprays have a pleasant scent and don’t leave my horse feeling sticky or greasy, which makes grooming afterward much easier.
5. Water Resistance
Since my horse sometimes sweats or gets caught in the rain, I appreciate fly sprays that hold up well even when wet, so I don’t have to reapply constantly.
Types of Fly Sprays I’ve Tried
- Natural Fly Sprays: Made with citronella, eucalyptus, or other essential oils. These are gentle and good for sensitive horses, but they often need frequent reapplication.
- Synthetic Fly Sprays: Contain ingredients like permethrin or pyrethrin. They usually provide longer-lasting and stronger protection but may not be suitable for all horses.
- Combination Sprays: Mix natural and synthetic ingredients for balanced effectiveness and gentleness.
Tips for Using Fly Spray Effectively
- Apply the spray evenly over the horse’s body, avoiding the eyes and mucous membranes.
- Spray before turnout or riding to maximize protection.
- Reapply as needed, especially after heavy sweating or rain.
- Test a small area first if using a new product to check for any skin reactions.
Final Thoughts
Choosing the best fly spray for my horse depends on their skin sensitivity, the type of insects in my area, and how long I want the protection to last. By considering these factors and trying out a few different sprays, I’ve found products that keep my horse comfortable all season long. I hope this guide helps you find the perfect fly spray for your equine friend!
Author Profile
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Kenneth Dizon is the voice behind CrossFitsawmill.com. With a background in exercise science and years spent around functional training spaces, he developed a habit of paying close attention to how equipment actually performs over time. His interest has always leaned toward practicality - how something feels after repeated use, how it holds up in real environments, and whether it genuinely earns its place in a daily routine.
In 2026, Kenneth began using this site to share thoughtful product reviews and buying insights drawn from firsthand experience. Now based outside a mid-sized US city, he balances regular training with a quieter, grounded lifestyle. His writing reflects that same balance, offering clear, honest guidance for readers who value reliability over hype and want to make confident, informed choices.
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