Ultra Boss Permethrin Insecticide Pour-On for Cattle, Sheep, Goats and Horses is a synergized formula containing 5% permethrin and 5% piperonyl butoxide. Use Ultra Boss Permethrin Insecticide Pour-On on lactating and non-lactating dairy cattle, beef cattle, calves, horses, lactating and non-lactating goats to control lice, horn flies and face flies, and to aid in the control of horse flies, stable flies, mosquitoes, black flies and ticks. Use on sheep to control lice and keds.