Contains a blend of full-fat soybeans, biotin, zinc, methionine, and iodine. Feed all classes of horses 1-2 ounces per day with feed (1 scoop = 1 ounce). Size is 25 Pound. Dimensions are 13 X 13 X 14.75 Ground Extruded Whole Soybeans, Lecithin, Yeast Culture, Dl-Methionine, Zinc Proteinate, D-Biotin And Ethylenediamine Dihydriodide. UPC Code = 180434000095