After testing hay and forage, then bleeding cows and comparing here is the custom mineral mix the lab and feed mill came up with.
Calcium… (min)…13 %...( max)…16.0%
Phosphorus (min)…………………..7.0%
Salt………. (min) …17.5 %...( max).21.0%
Magnesium (min)…………………….2.0%
Potassium (min)………………………0.3%
Zinc (min)………………………5,500 ppm
Manganese (min)……………….3,000 ppm
Copper (min) …………………...3,500 ppm
Selenium (min)…………………….40 ppm
Vitamin A (min)……………300,000 IU/lb
Ingredients:
Monocalcium Phosphate, Dicalcium Phosphate , Calcium Carbonate, Salt, Corn Distillers Dried Grains with solubles, Magnesium Oxide, Mineral Oil, Zinc Sulfate, Processed Grain Byproducts, Copper Sulfate, Manganese sulfate, Copper Proieinate , Yeast Culture, Sodium Selenite, Zinc Proteinate , Iron Oxide, Potassium Chloride, Red coloring, Vitamin E supplement , Vitamin A supplement,, Artificial Flavoring, Calcium Iodine, Vitamin D supplement, Ethylene Diainine Diaydnodide , Cobalt Sulfate
Caution: Product contains 18.2mg of Selenium per lb do not exceed 2.75 oz per head per day .