Farnam SimpliFly Feed-Thru Fly Control for Horses is a highly effective solution to combat flies in your stable by targeting them at their source - your horse's manure. This feed contains diflubenzuron, a fly growth regulator that breaks the fly lifecycle by inhibiting the development of fly larvae in the manure. By adding this palatable feed to your horse's daily diet, you can create a 'No Fly Zone' and prevent the production of thousands of flies. Start feeding SimpliFly daily for optimal results and enjoy a fly-free environment for your horse.