Cheapest Horse Fly Control
Fly control for horses is a seasonal but significant recurring cost, combining sprays, wipe-ons, feed-through control, and fly sheets or masks depending on your climate and how sensitive your horse is to insect bites. Most serious horse owners end up using two or three of these together during peak fly season, which makes the category add up quickly.
Because it's seasonal, prices also fluctuate with demand — fly spray tends to be more expensive in peak summer months than if you stock up in early spring.
Commonly Compared Products
Absorbine UltraShield EX
Long-lasting insecticide/repellent spray.
Farnam Endure Sweat-Resistant Fly Spray
Sweat- and water-resistant fly spray.
Solitude IGR
Feed-through insect growth regulator for fly control.
Farnam Bronco E Equine Fly Spray
Citronella-scented spray, also sold in a lower-cost-per-gallon refill size.
Price Comparison
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Absorbine UltraShield EX Insecticide and Repellent, 32fl oz
Absorbine · Permethrin 0.50%, Pyrethrins 0.10%, Piperonyl Butoxide 1.0% · Spray
| Retailer | Package | Price | Price per fl oz | |
|---|---|---|---|---|
| ChewyBest unit price | 32 fl ozsList price $35.99 | $27.49 | $0.859 | View → |
| Amazon | 32 fl ozs#2 in Horse Fly Repellents. May show as unavailable depending on your shipping address/region, but this is a real, purchasable listing. | $27.49 | $0.859 | View on Amazon → |
| Tractor Supply | 32 fl ozsListed as "1 qt." — same 32 fl oz size. Also sold in a 1-gallon size. | $29.99 | $0.937 | View → |
Package sizes differ between retailers. Prices last checked on 2026-09-18. Prices and availability may change.
Farnam Endure Sweat-Resistant Fly Spray for Horses, 32fl oz
Farnam · Cypermethrin 0.15%, Pyrethrins 0.20%, Piperonyl Butoxide 1.60% · Spray
| Retailer | Package | Price | Price per fl oz | |
|---|---|---|---|---|
| ChewyBest unit price | 32 fl ozsList price $31.49 | $24.99 | $0.781 | View → |
| Amazon | 32 fl ozs#1 Best Seller in its category. | $24.99 | $0.781 | View on Amazon → |
| Tractor Supply | 32 fl ozsListed as "1 qt." — same 32 fl oz size. Previous list price was $29.99. | $26.99 | $0.843 | View → |
Package sizes differ between retailers. Prices last checked on 2026-09-18. Prices and availability may change.
Solitude IGR Horse Fly Preventive
Zoetis · Cyromazine 2.12% · Feed-through pellets
| Retailer | Package | Price | Price per lb | |
|---|---|---|---|---|
| Tractor SupplyBest unit price | 20 lbsOnly the 20-lb size is currently orderable from Tractor Supply (a 6-lb listing exists on their site but is not currently available to order). Package sizes differ, but Tractor Supply works out cheaper per pound. | $355.00 | $17.750 | View → |
| Chewy | 6 lbs6-lb bucket. | $123.97 | $20.662 | View → |
Package sizes differ between retailers. Prices last checked on 2026-09-18. Prices and availability may change.
Farnam Bronco E Equine Fly Spray Plus Citronella Scent, 128fl oz
Farnam · Prallethrin 0.033%, Permethrin 0.100%, Piperonyl Butoxide 0.500% · Spray
| Retailer | Package | Price | Price per fl oz | |
|---|---|---|---|---|
| ChewyBest unit price | 128 fl ozsList price $31.49 | $29.97 | $0.234 | View → |
| Amazon | 128 fl ozs#5 in Horse Fly Repellents. May show as unavailable depending on your shipping address/region, but this is a real, purchasable listing. | $29.97 | $0.234 | View on Amazon → |
| Tractor Supply | 128 fl ozsListed as "1 gal." — same 128 fl oz size. Also sold in a 32 fl oz (1 qt.) size, priced $26.99–$34.99. | $34.99 | $0.273 | View → |
Package sizes differ between retailers. Prices last checked on 2026-09-18. Prices and availability may change.
Why Do Prices Vary So Much?
Concentrate fly sprays are consistently cheaper per gallon once mixed than ready-to-use bottles, sometimes by a wide margin, and buying before peak season avoids the seasonal price bump that most retailers apply as demand rises. Feed-through control is priced per head per month, so multi-horse households benefit most from comparing bulk pricing across suppliers.
Frequently Asked Questions
Is concentrate fly spray actually cheaper once you account for mixing?
Yes, typically — concentrate works out to a lower cost per gallon of usable spray than ready-to-use bottles, even after buying a sprayer bottle.
When is the best time to buy fly control products for the lowest price?
Early spring, before fly season peaks and before retailers raise prices in response to seasonal demand.
Do I need both a spray and feed-through control?
Many owners use both, since feed-through control targets fly larvae in manure while sprays protect against flies already present.
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