Purina Senior has Alfalfa, Wheat middlings, Soybean hulls, Ground corn, Cane molasses, Soybean meal, under 10% wt/wt sugar and starch with added organic copper, zinc, selenium etc. at these levels:
3.00 PPM iodine
0.60 PPM selenium
280.00 PPM zinc
0.45 % sulfur
220.00 PPM iron
3500 IU/LB...