Gordon's 1 lb. Dairy & Livestock Dust is a ready-to-use insecticide formulation that effectively controls listed flies, lice, fleas, and ticks on livestock, horses, poultry, and dogs. This dust can be applied using mechanical dust applicators or dust bags. The active ingredient in this dust is 0.25% permethrin. It comes in an off-white color and has a density of 30 to 50 pounds per cubic foot.