Ultra Boss Pour-On Insecticide is a ready-to-use liquid formulated with permethrin and piperonyl butoxide for topical application to the backline and face of livestock. It is labeled for beef and dairy cattle (including calves), sheep, goats and horses, and is designed to control lice and flies while aiding in the control of ticks and additional biting insects. The product requires no dilution and is measured out with a squeeze-style bottle for dosing by body weight. It can be poured directly onto the animal or diluted for use in a cattle rub or backrubber device charged with diesel or mineral oil. There is no milk discard period and no preslaughter withdrawal time associated with labeled use. Handlers are directed to avoid skin, eye and clothing contact during application and to store the sealed container away from food or feed.