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Think feed-thru fly control repels flies off your horse? Busted. 🧠 MultiFly isn’t a repellent. It works in the manure of treated horses to break the fly life cycle by preventing larvae from developing an exoskeleton. It’s safe for horses, easy to feed in alfalfa-based pellets, and proudly made in Colorado. Feed one scoop per day to every horse in your barn. 👉 Try a bag for yourself below!