Nutrena NutreBeef Hi-Mag Mineral was specially designed to provide the necessary magnesium for your lactating cows that graze on pasture, to avoid grass tetany. Use it to make sure your cattle have everything they need for healthy growth, development, and feed efficiency. The course form of vitamins and minerals increases animal acceptance and reduces product loss due to weather elements. This mineral is designed to be fed to beef cattle on pasture.