Protein formulation guide:Draw a rectangle on a sheet of paper and write in the center the percentage of protein desired for the ration. In the upper left-hand corner, jot the word "grain" and the assumed value of 10. Enter the word "supplement" in the lower left-hand corner, with the average figure for these ingredients. Then subtract diagonally—always taking the smaller number from the larger—and note the answers on the right. The figure in the lower right-hand corner is the amount of supplement, in pounds, you'll need to combine with the quantity of grain (also in pounds) shown directly above
