Durvet Durafend 2.27gm Fenbendazole Wormer 1lb isa multi-species, medicated pellet dewormer for beef/dairy cattle, horses, and zoo/wildlife animals, controlling roundworms, strongyles, and pinworms with 2.27g offenbendazoleper pound, offering easy top-dressing and no milk withdrawal for cattle, but requiring specific dosing for different animals and worm types.