Cattlemen's Choice 1% Permethrin Synergized Pour-On is the perfect aid in controlling flies and lice on lactating and non-lactating cattle, on beef cattle, and calves. It will also control keds on lambs and sheep. For cattle and calves, this product will help control lice, face flies, house flies, horn flies black flies, mosquitoes and horse flies. For sheep, it will target sheep keds and lice when used as a pour on. It can also be used around farm animal premises, animal hospital kennels and outside meat processing. This is a ready-to-use product that can be applied as a pour-on, back rubber or by spraying.