Deer seek out and consume key dietary supplements that may be lacking in their environment. About 5% of a deer's total weight is made up of "minerals." These elements and compounds generally comprise 2 main groups: macro-nutrients and micro-nutrients, based on the amount needed or used. "Macro" is required in larger quantities, while "micro" is needed or used in much smaller quantities. Both of these groups are important for deer. Macronutrients include calcium, phosphorus, magnesium, sodium, potassium, and sulfur. Micronutrients include zinc, copper, iron, and manganese. Deer have a remarkable ability to balance their diet with nutrients they otherwise lack. Providing Jurassic Mineral Rock can help keep your herd healthy, thriving, and circulating in your area.