Formulated to provide essential salt plus the correct balance of trace minerals (zinc .35 percent; iron .20 percent; manganese .20 percent; copper .03 percent; iodine .007 percent; cobalt .005 percent) for healthy beef and dairy cattle, swine and horses. Also contains 80-90ppm of selenium. Selenium is included as a preventative measure against paralysis, heart failure, nutritional muscular dystrophy (white muscle disease) and reduced reproductive performance in older beef animals. Weather-resistant blocks for free-choice feeding. Packaged with or without a corrugated, protective sleeve. Sheep are susceptible to copper deficiency and copper toxicosis. Consult a qualified nutritionist or veterinarian to determine the susceptibility of this condition for sheep in your area. Available in limited areas.