Durafend, 5 LB, Medicated Feed, Multi-Species Medicated Dewormer Is Indicated For The Control & Removal Of Lungworms, Stomach Worms, Intestinal Worms, Bankrupt Worms, & Nodular Worms In A Broad Range Of Animals, Pellets May Be Top Dressed Or Blended With Feed, Comes With A Measuring Scoop, For Use On Beef & Dairy Cattle, Horses, Swine, Growing Turkeys, Zoo & Wildlife Animals, No Milk Withdrawal Period For Dairy Cattle, Durafend Contains 0.5%, 2.27 Gram/LB, Active Ingredient: Fenbendazole.