UltraCruz Cattle Copper Bolus is an excellent source of slow-release copper designed to provide all Cattle with this essential trace mineral in order to support a healthy hair coat and proper growth as well as aid in the prevention of copper deficiency. Under most conditions, these boluses provide between 8 and 12 months of sustained copper supplementation. Copper deficiency is a common problem in Cattle, therefore these boluses are especially beneficial for Cattle living in copper deficient areas.