North American Salt 41015 American Stockman Iodized Block of Salt Pet Supplement, 50-Pound 50 Lb. Iodized Block Of Ag Salt Iodized Salt Is The Most Common Of All Mineralized Salts Midwest and Great Lakes Regions Are Normally Lower In Iodine Levels Required For Basic Animal Health Formulated For All Classes Of Beef and Dairy Cattle, Pigs and Horses