10 Best Fly Sprays for Horses 2026: According to Reviews | Chewy

The 10 Best Fly Sprays for Horses

How we created this fly spray list

We leveraged input from our veterinarians and artificial intelligence to identify key considerations to help you find the best fly sprays for horse.
We scanned thousands of customer reviews and ratings and scored each product based on its performance against each of the key considerations. We then considered how popular a product is with Chewy customers and combined that with its key consideration scores to create the list of the best fly sprays for horses.

Key fly spray considerations

Ease of Application

Effectiveness

Ingredients

Longevity

Our Top Picks

1
Pyranha Wipe N' Spray Fly Protection Horse Spray, 32-fl oz bottle
Pyranha Wipe N' Spray Fly Protection Horse Spray, 32-fl oz bottle
Pyranha Wipe N' Spray Fly Protection Horse Spray, 32-fl oz bottle

Pyranha Wipe N' Spray Fly Protection Horse Spray, 32-fl oz bottle

Rated 4.7 out of 5 stars
944
$22.95 Chewy Price
($0.72/fl oz)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Ease of Application

4.5/5
Great

Effectiveness

4.6/5
Excellent

Ingredients

4.4/5
Great

Longevity

4.3/5
Great

Is this fly spray right for my pet?

Top Ingredients

Active Ingredients: Pyrethrins, Piperonyl Butoxide & Butoxpolypropylene Glycol

Farm Animal Type

Horse

Health Feature

Pest Control
2
Farnam SimpliFly Feed-Thru Fly Control Pellets Horse Supplement, 20-lb bucket
Farnam SimpliFly Feed-Thru Fly Control Pellets Horse Supplement, 20-lb bucket
Farnam SimpliFly Feed-Thru Fly Control Pellets Horse Supplement, 20-lb bucket
Farnam SimpliFly Feed-Thru Fly Control Pellets Horse Supplement, 20-lb bucket
Farnam SimpliFly Feed-Thru Fly Control Pellets Horse Supplement, 20-lb bucket
Farnam SimpliFly Feed-Thru Fly Control Pellets Horse Supplement, 20-lb bucket
Farnam SimpliFly Feed-Thru Fly Control Pellets Horse Supplement, 20-lb bucket
Farnam SimpliFly Feed-Thru Fly Control Pellets Horse Supplement, 20-lb bucket
Farnam SimpliFly Feed-Thru Fly Control Pellets Horse Supplement, 20-lb bucket

Farnam SimpliFly Feed-Thru Fly Control Pellets Horse Supplement, 20-lb bucket

Rated 4.7 out of 5 stars
444
$153.97 Chewy Price
($7.70/lb)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Ease of Application

4.6/5
Excellent

Effectiveness

4.6/5
Excellent

Ingredients

4.6/5
Excellent

Longevity

4.3/5
Great

Is this fly spray right for my pet?

Lifestage

All Lifestages, Adult

Top Ingredient

Diflubenzuron

Farm Animal Type

Horse

Food Form

Feed, Supplement
3
Absorbine UltraShield EX Insecticide, Kills & Repels Horse Fly Spray Refill, 128-fl oz bottle
Absorbine UltraShield EX Insecticide, Kills & Repels Horse Fly Spray Refill, 128-fl oz bottle
Absorbine UltraShield EX Insecticide, Kills & Repels Horse Fly Spray Refill, 128-fl oz bottle
Absorbine UltraShield EX Insecticide, Kills & Repels Horse Fly Spray Refill, 128-fl oz bottle
Absorbine UltraShield EX Insecticide, Kills & Repels Horse Fly Spray Refill, 128-fl oz bottle
Absorbine UltraShield EX Insecticide, Kills & Repels Horse Fly Spray Refill, 128-fl oz bottle

Absorbine UltraShield EX Insecticide, Kills & Repels Horse Fly Spray Refill, 128-fl oz bottle

Rated 4.7 out of 5 stars
348
$79.19 Chewy Price
($0.62/fl oz)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Ease of Application

4.5/5
Great

Effectiveness

4.5/5
Great

Ingredients

4.5/5
Great

Longevity

4.4/5
Great

Is this fly spray right for my pet?

Top Ingredients

Permethrin, Pyrethrins, Piperonyl Butoxide

Farm Animal Type

Horse

Health Feature

Pest Control
4
Martin's Permethrin 36.8% SFR Concentrate Termiticide & Insecticide, Pint
Martin's Permethrin 36.8% SFR Concentrate Termiticide & Insecticide, Pint

Martin's Permethrin 36.8% SFR Concentrate Termiticide & Insecticide, Pint

Rated 4.7 out of 5 stars
190
$31.49 Chewy Price
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Ease of Application

4.4/5
Great

Effectiveness

4.4/5
Great

Ingredients

4.2/5
Great

Longevity

4.3/5
Great

Is this fly spray right for my pet?

Top Ingredient

36.8% Permethrin

Farm Animal Type

Cattle, Pig, Poultry, Horse

Health Feature

Pest Control
5
Equiderma Herbal Horse Spray, 1-gal
Equiderma Herbal Horse Spray, 1-gal

Equiderma Herbal Horse Spray, 1-gal

Rated 4.8 out of 5 stars
125
$89.99 Chewy Price
($89.99/gl)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Ease of Application

4.6/5
Excellent

Effectiveness

4.7/5
Excellent

Ingredients

4.6/5
Excellent

Longevity

4.6/5
Excellent

Is this fly spray right for my pet?

Top Ingredients

Neem Oil, Neem Leaf, Citronella Oil, Eucalyptus Oil, Lavandin Grosso Oil

Farm Animal Type

Horse

Health Feature

Skin & Coat Health, Herbal Remedy, Pest Control
6
Ecovet Fly Repellent Horse Spray, 18-fl oz bottle
Ecovet Fly Repellent Horse Spray, 18-fl oz bottle
Ecovet Fly Repellent Horse Spray, 18-fl oz bottle
Ecovet Fly Repellent Horse Spray, 18-fl oz bottle
Ecovet Fly Repellent Horse Spray, 18-fl oz bottle
Ecovet Fly Repellent Horse Spray, 18-fl oz bottle
Ecovet Fly Repellent Horse Spray, 18-fl oz bottle
Ecovet Fly Repellent Horse Spray, 18-fl oz bottle
Ecovet Fly Repellent Horse Spray, 18-fl oz bottle

Ecovet Fly Repellent Horse Spray, 18-fl oz bottle

Rated 4.3 out of 5 stars
277
$28.95 Chewy Price
($1.61/fl oz)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Ease of Application

4.3/5
Great

Effectiveness

4.3/5
Great

Ingredients

4.3/5
Great

Longevity

4.2/5
Great

Is this fly spray right for my pet?

Top Ingredients

Octanoic Acid: 5.0% , Nonanoic Acid: 5.0% , Decanoic Acid: 5.0% , Other ingredients: 85.0%

Farm Animal Type

Horse

Health Feature

Pest Control
7
Starbar Quikstrike Fly Scatter Bait, 1-lb can
Starbar Quikstrike Fly Scatter Bait, 1-lb can
Starbar Quikstrike Fly Scatter Bait, 1-lb can
Starbar Quikstrike Fly Scatter Bait, 1-lb can
Starbar Quikstrike Fly Scatter Bait, 1-lb can

Starbar Quikstrike Fly Scatter Bait, 1-lb can

Rated 4.2 out of 5 stars
258
$8.99 Chewy Price
($8.99/lb)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Ease of Application

4.3/5
Great

Effectiveness

3.9/5
Good

Ingredients

4.2/5
Great

Longevity

3.9/5
Good

Is this fly spray right for my pet?

Top Ingredients

Active Ingredient: Dinotefuran 0.50%, Z-9 Triscosene 0.04%

Farm Animal Type

Horse

Health Feature

Pest Control
8
Solitude IGR Horse Fly Preventive, 20-lb bucket
Solitude IGR Horse Fly Preventive, 20-lb bucket
Solitude IGR Horse Fly Preventive, 20-lb bucket
Solitude IGR Horse Fly Preventive, 20-lb bucket
Solitude IGR Horse Fly Preventive, 20-lb bucket

Solitude IGR Horse Fly Preventive, 20-lb bucket

Rated 4.8 out of 5 stars
66
$355.19 Chewy Price
($17.76/lb)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Ease of Application

4.7/5
Excellent

Effectiveness

4.8/5
Excellent

Ingredients

4.5/5
Great

Longevity

4.7/5
Excellent

Is this fly spray right for my pet?

Top Ingredients

Active Ingredients: Cyromazine: N-Cyclopropyl-1, 3.5-Triazine-2, 4, 6-Triamine 2.12%, Other Ingredients: 97.88%

Farm Animal Type

Horse

Food Form

Powder

Health Feature

Pest Control
9
Farnam Swat Dog & Horse Fly Repellent, 7-fl oz tub
Farnam Swat Dog & Horse Fly Repellent, 7-fl oz tub
Farnam Swat Dog & Horse Fly Repellent, 7-fl oz tub
Farnam Swat Dog & Horse Fly Repellent, 7-fl oz tub
Farnam Swat Dog & Horse Fly Repellent, 7-fl oz tub
Farnam Swat Dog & Horse Fly Repellent, 7-fl oz tub
Farnam Swat Dog & Horse Fly Repellent, 7-fl oz tub
Farnam Swat Dog & Horse Fly Repellent, 7-fl oz tub

Farnam Swat Dog & Horse Fly Repellent, 7-fl oz tub

Rated 4.8 out of 5 stars
365
$15.49 Chewy Price
($2.22/fl oz)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Ease of Application

4.6/5
Excellent

Effectiveness

4.6/5
Excellent

Ingredients

4.5/5
Great

Longevity

4.4/5
Great

Is this fly spray right for my pet?

Top Ingredients

Piperonyl Butoxide, Butylcarbityl, 6-Propylpiperonyl, Ether And Related Compounds, Pyrethrins

Farm Animal Type

Horse

Health Feature

Skin & Coat Health
10
Spartan Mosquito Pro Tech Mosquito Killer, 2 count
Spartan Mosquito Pro Tech Mosquito Killer, 2 count
Spartan Mosquito Pro Tech Mosquito Killer, 2 count
Spartan Mosquito Pro Tech Mosquito Killer, 2 count

Spartan Mosquito Pro Tech Mosquito Killer, 2 count

Rated 4.1 out of 5 stars
232
$23.95 Chewy Price
($11.98/ea)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Ease of Application

3.9/5
Good

Effectiveness

4.2/5
Great

Ingredients

4.1/5
Great

Longevity

3.9/5
Good

Is this fly spray right for my pet?

Top Ingredient

Active Ingredient: Boric Acid 9.04%

Farm Animal Type

Horse

Health Feature

Pest Control