Pour-On for Cattle is for treatment and control of parasites in cattle. pour-on is effective against roundworms, lungworms, grubs, horn flies, sucking and biting lice, and sarcoptic mange mites in cattle. Rain-fast after 6 hours. Apply to cattle along the topline in a narrow strip extending from the withers to the tailhead. 5L size may be applied with a Pour-On Gun, sold separately. Safe for pregnant cattle. Use at the rate of 1 ml per 22 lbs. body weight.