American Stockman, 50 LB, Sulphur Block Ag Salt, Is Required For The Development Of Protein, Cartilage, Bones & Tendons, It Enhances Enzyme Activity That Is Important In Hair & Wool Production, Sulfur Is Also Believed To Work As An Insect Repellant, Most Diets Contain Adequate Sulfur, However, Dairy Cattle & Sheep Can Benefit From Higher Levels.