When flies are a menace in your stable, it's time to target them at their source – your horse's manure. If not treated, the manure from one horse has the potential to produce tens of thousands of flies in a single day. Introduce SimpliFly Feed-Thru Fly Control to your horse's daily diet, and suddenly you're turning the favorite breeding grounds of stable and house flies into a No Fly Zone. When fed daily, SimpliFly Feed-Thru Fly Control breaks the fly lifecycle by preventing fly larvae from developing in a horse's manure. This fly growth regulator is made without organophosphates and will pass through your horse's body unabsorbed. The feed will instead excrete the active ingredient diflubenzuron into their manure, preventing it from being a viable breeding ground. This product can be effectively started anytime during fly season, but for best results, beginning daily feeding in early spring before fly season is optimal. SimpliFly Feed-Thru Fly Control is a highly palatable mixture that your horse will readily eat and easily mixes in with their daily feed. As part of an integrated, pest management program, you can see a significant decline in this season's fly population. Keep your stable happy and target the fly problem at its source with SimpliFly Feed-Thru Fly Control. Bugs don't fly with Farnam, your partner in horse care.