Feed-through fly control products help reduce fly populations around horses by targeting larvae in manure. These safe supplements mix with feed and stop flies before they hatch.
Flies cause discomfort and spread disease to horses. Managing them improves horse health and comfort. Feed-through fly controls work from the inside out. They pass through the horse’s digestive system and affect fly larvae in the manure. This method lowers the number of adult flies nearby.
Popular products include Formula 707, Farnam SimpliFly, Farnam Equitrol II, and Champion USA JustiFLY. Each offers safe, palatable options for daily use. Choosing the right product depends on your horse’s needs and stable conditions. Effective fly control means fewer flies and a happier, healthier horse.
Formula 707 Multifly Feed-thru Fly Control Pellets For Horses

The Formula 707 MultiFly Feed-Thru Fly Control Pellets for Horses are ideal for horse owners looking for a safe and effective way to reduce fly populations around their animals. If you want a palatable solution that integrates easily into your horse’s diet while helping to control flies naturally, this product is a perfect choice. It is especially suitable for those seeking a convenient and long-lasting fly control method without relying on harsh chemicals.
Pros:
- Easy to administer as part of daily feed
- Palatable formula that horses readily accept
- Safe for horses with no harmful side effects
- Effective fly population reduction over time
- Large 10 lb bag provides 182 servings for long-term use
- Manufactured by reputable John Ewing Company
Cons:
- Requires consistent daily feeding to maintain effectiveness
- Not an instant solution; fly control develops gradually
The Formula 707 MultiFly Feed-Thru Pellets work by interrupting the fly life cycle when ingested by horses, reducing the number of flies in the environment. This feed-thru approach means the product targets flies in their larval stage, providing a natural and safe method of control without the use of harsh chemicals or sprays. Its palatable nature ensures that horses consume the pellets willingly, making administration hassle-free for owners.
With a substantial 10 lb bag offering 182 servings, this product provides excellent value and convenience. The consistent use of these pellets helps maintain a lower fly population around your horses, leading to increased comfort and reduced stress for your animals. Being manufactured by the trusted John Ewing Company further guarantees the quality and safety of this fly control solution.
Farnam Simplifly Feed Through Fly Control For Horses

The Farnam SimpliFly Feed Through Fly Control for Horses is ideal for horse owners and stable managers seeking an effective, easy-to-use solution to manage and reduce fly populations around their horses. This product is especially suitable for those who want a safe, EPA-approved method to prevent stable flies breeding in manure, ensuring a healthier environment for their animals without the hassle of frequent topical treatments.
Pros:
- EPA-approved pellets designed specifically to prevent stable flies in manure.
- Safe and palatable daily supplement, making it easy to administer to horses.
- Provides a 60-day supply in a convenient 3.75-pound container.
- Reduces fly populations effectively, improving horse comfort and stable hygiene.
- Manufactured by trusted brand Farnam, ensuring quality and reliability.
Cons:
- Only effective when used consistently as part of a daily feeding routine.
- May not eliminate all types of flies beyond stable flies.
- Requires proper manure management to maximize effectiveness.
The Farnam SimpliFly Feed Through Fly Control is formulated as brown pellets that horses consume daily, targeting the fly lifecycle by preventing larvae from developing in manure. Its unique feed-through design means it works internally and naturally, reducing the need for chemical sprays or topical fly repellents. This feature benefits users by simplifying fly control while promoting a safer environment for their horses, as the product is non-toxic and palatable.
With dimensions of 7.5 inches in height, 6.5 inches in width, and 5.0 inches in length, and weighing 3.75 pounds, this product is compact and easy to store. The 60-day supply ensures long-term fly population control, reducing maintenance efforts. By using this supplement regularly, horse owners experience fewer fly-related irritations and associated health risks, leading to improved horse wellbeing and enhanced stable cleanliness.
Farnam Equitrol Ii Feed-through Fly Control For Horses

The Farnam Equitrol II Feed-Through Fly Control for Horses is ideal for horse owners who are looking for an effective and convenient solution to manage fly populations around their animals. This product is perfect for those who want a highly palatable feed additive that integrates seamlessly into their horse’s daily diet, providing long-lasting fly control without the need for messy sprays or topical treatments. If you prioritize the health and comfort of your horse while seeking a hassle-free fly control method, this 320-day supply bucket is an excellent choice.
Pros:
- Highly palatable feed additive that horses readily consume
- Long-lasting 320-day supply for one horse, reducing frequent purchases
- Easy to administer by mixing with regular feed
- Effectively reduces fly populations through feed-through action
- Packaged in a convenient 20-pound bucket for storage and handling
Cons:
- Designed for one horse; may not be cost-effective for multiple horses without additional purchases
- Requires consistent daily feeding for optimal results
- Brown color may stain feed or storage areas if spilled
The Farnam Equitrol II utilizes a feed-through fly control system that interrupts the life cycle of flies by targeting larvae in manure. This innovative approach helps reduce the adult fly population around your horse naturally and efficiently. Because it is a highly palatable additive, horses accept it easily without fuss, ensuring consistent intake and continuous fly control. The convenient 20-pound bucket provides an ample 320-day supply, making it cost-effective and reducing the frequency of repurchasing.
Additionally, this product is manufactured by Central Garden & Pet, a trusted brand in animal care, which guarantees quality and reliability. Its compact dimensions (9.75 inches in height, 10.5 inches in width and length) make it easy to store in barns or feed rooms. By incorporating Farnam Equitrol II into your horse’s diet, you can enjoy a cleaner, more comfortable environment free from bothersome flies, ultimately promoting your horse’s health and well-being.
Farnam Equi-spot Horse Fly Control

The Farnam Equi-Spot Horse Fly Control is ideal for horse owners seeking an effective, long-lasting solution to protect their horses from bothersome flies. If you want to ensure your horse remains comfortable and free from irritating insects during outdoor activities or in the stable, this product offers a convenient and reliable option. It is perfect for those who prefer a simple application with extended protection, suitable for both casual riders and professional equestrians.
Pros:
- Long-lasting protection with up to 12 weeks of effectiveness per application
- Provides 6 applications per bottle, offering great value
- Clear formula that is easy to apply and non-greasy
- Compact dimensions (6.77 x 1.35 x 4.28 inches) and lightweight (0.128 pounds) for easy handling
- Manufactured by Central Garden & Pet, a trusted brand in animal care products
Cons:
- Designed for one horse only, so may not be cost-effective for multiple horses
- May require reapplication in extremely fly-heavy environments
- Not a solution for other types of pests beyond horse flies
The Farnam Equi-Spot utilizes an effective formula that targets horse flies, providing long-lasting protection that lasts up to 12 weeks per application. This means fewer treatments and less hassle for horse owners, making it a practical choice for maintaining your horse’s comfort. Its clear, non-greasy formula ensures easy and clean application without affecting the horse’s appearance or coat texture.
Each bottle contains 6 applications, offering a generous supply to cover your horse throughout the fly season. The product’s compact size and lightweight design make it easy to store and apply. By consistently using Farnam Equi-Spot, horse owners can significantly reduce the stress and irritation caused by horse flies, improving their horse’s overall well-being and performance.
Champion Usa Justifly Feedthrough Cattle Fly Control

The Champion USA JustiFLY Feedthrough Cattle Fly Control is ideal for cattle farmers and ranchers seeking an effective, easy-to-use solution for managing fly populations around their livestock. Designed specifically to control all four major fly species that affect cattle, this product is perfect for those who want a non-toxic larvicide that ensures the health and comfort of their herd without harmful chemicals. If you are looking for a reliable fly control method that has been proven on over 50 million head of cattle, this item is an excellent choice.
Pros:
- Controls all four common fly species that affect cattle
- Non-toxic larvicide, safe for animals and the environment
- Easy-to-use feedthrough formula
- Proven effectiveness with over 50 million head treated
- Compact dimensions make storage and handling convenient (8.0 x 2.0 x 5.0 inches)
- Produced by trusted brand JustiFLY under Champion Animal Health
Cons:
- Single unit may require multiple purchases for large herds
- Effectiveness depends on proper dosage and administration
The Champion USA JustiFLY Feedthrough Cattle Fly Control features a specialized larvicide that cattle consume through feed, disrupting the fly life cycle at the larval stage. By targeting fly larvae in manure, it prevents adult flies from emerging and reduces the overall fly population around the cattle. This method not only decreases irritation and stress for the animals but also improves overall herd health and productivity by minimizing fly-borne diseases.
Manufactured by Champion Animal Health, this product is designed with convenience and safety in mind. Its compact size allows for easy storage and handling, while the non-toxic formula ensures no harmful residues accumulate in the environment or the cattle. With a track record of treating over 50 million head of cattle, the JustiFLY feedthrough is a trusted and proven solution for sustainable fly control in cattle operations of all sizes.
Champion Usa Justifly Feedthrough Cattle Fly Control

The Champion USA JustiFLY Feedthrough Cattle Fly Control, 6 Pack is an ideal solution for cattle farmers and ranchers seeking an effective, non-toxic method to manage fly infestations. If you are looking to protect your herd from the discomfort and potential health risks caused by flies, this product is designed specifically for you. It is perfect for those who want a reliable, easy-to-use larvicide that targets all four major fly species affecting cattle.
Pros:
- Non-toxic larvicide ensuring safety for cattle and the environment
- Controls all four fly species that affect cattle
- Effective for over 50 million head treated, indicating strong performance
- Convenient 6 pack providing long-term fly control
- Compact dimensions (8.0 x 2.0 x 5.0 inches) for easy storage and handling
Cons:
- May require consistent application to maintain effectiveness
- Not a quick-kill insecticide but a larvicide, so results appear over time
The Champion USA JustiFLY Feedthrough Cattle Fly Control features a scientifically formulated, non-toxic larvicide that interrupts the fly life cycle by targeting larvae in the manure before they mature into adult flies. This approach ensures a safer environment for your cattle compared to harsh chemical insecticides. By controlling all four fly species, it provides comprehensive protection, reducing irritation, stress, and the risk of disease transmission among your herd.
Its user-friendly feedthrough design means that it easily integrates into your cattle’s diet, simplifying the fly control process without requiring additional labor-intensive treatments. The product’s proven track record of treating over 50 million head underscores its reliability and effectiveness. For farmers seeking a sustainable and efficient fly control solution, this product offers both peace of mind and improved cattle wellbeing.
Frequently Asked Questions
What Is The Best Feed-through Fly Control For Horses?
Formula 707 MultiFly and Farnam Equitrol II are top-rated for effectiveness and safety. Both reduce fly populations by targeting larvae in manure.
How Do Feed-through Fly Control Pellets Work?
They pass through the horse’s digestive system and kill fly larvae in manure. This breaks the fly life cycle and reduces adult flies.
Are These Fly Controls Safe For Horses?
Yes, products like Farnam SimpliFly and Equi-Spot are EPA-approved and palatable. They are designed to be safe for daily use in horses.
How Long Do Feed-through Fly Controls Last?
Most products, like Farnam Equitrol II, provide around 60 to 320 days of protection. Duration varies based on dosage and product type.
Can Feed-through Fly Control Be Used For Other Animals?
Champion USA JustiFLY is formulated for cattle but controls multiple fly species. However, always use products specifically labeled for horses to ensure safety.
Conclusion
Effective fly control is essential for keeping horses comfortable and healthy. Feed-through fly control products help reduce fly populations by targeting larvae in manure. Options like Formula 707, Farnam SimpliFly, and Equitrol II offer safe, easy-to-use pellets that horses readily accept.
Equi-Spot provides long-lasting protection with fewer applications. Champion USA JustiFLY also works well to control multiple fly species and is non-toxic. Choosing the right product depends on your needs, the size of your stable, and how long you want protection.
Consistent use of feed-through fly control reduces flies around your horses and lowers the risk of fly-borne diseases. This leads to a more pleasant environment for both horses and handlers. Remember, combining feed-through products with good stable management will give the best results.
Control flies effectively, keep your horses happy, and enjoy a cleaner, healthier barn all season long.
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