Designed for deworming pastured cattle by feeding these medicated blocks for three days only as the sole source of salt. For the removal and control of: Lungworms, Stomach worms, Brown stomach worm, Intestinal worms, Hookworm, Thread-necked intestinal worm, Small intestinal worms, Bankrupt worm, and Nodular worms. One block treats 8,000 lb. (500 lb. of cattle per 1.5 lb.).