For effective broad spectrum deworming, use Safe-Guard Medicated Dewormer Block for Cattle. This highly palatable, soft poured molasses block contains fenbendazole, which will control and remove lungworms, stomach worms, barberpole worms, brown stomach worms, small stomach worms, intestinal worms, hookworms, thread-necked intestinal worms, small intestinal worms, bankrupt worms and nodular worms.