Description Farnam's SimpliFly is a feed supplement for horses that prevents stable and house flies from living in your horse's manure. This supplement concludes the life cycle of fly larvae by impeding their exoskeleton's formation, ultimately killing any potential new larvae. SimpliFly is considered a reduced risk pesticide, making it safe to use for pest management. Features: Eliminates flies by breaking their life cycle Used as an added supplement to grain Prevents development of house and stable flies Safe to use for pest management efforts