Permectrin Fly & Louse Dust makes controlling flies and lice on livestock easy. For use on beef cattle, dairy cattle (including lactating), swine* and poultry, this ready-to-use dust insecticide can be applied using a shaker can. Permectrin livestock dust is formulated to control horn flies on beef and dairy cattle, northern fowl mites on poultry and lice on swine. See label for complete directions for use and application instructions