Swine Guard is a ready-to use oil-based pour-on formulation for swine containing permethrin, a highly effective synthetic pyrethroid for control of mange mites, lice and flies. The highly concentrated formulation requires a low dose, making it very cost effective. Apply to swine 100 lbs. and over at the rate of 3 ml per 100 lbs. body weight. One gallon treats 256 hogs (500 lbs.+).