With the prices of cereal grains rising, opportunities to reduce feed costs by using alternative ingredients are being explored. One source of alternative feed ingredients is co-products from the human food industries. However, little information has been published on the digestibility of energy in these ingredients. Therefore, an experiment was conducted to determine the concentrations of digestible and metabolizable in hominy feed, bakery meal, corn gluten meal, corn gluten feed, and corn germ meal, and to compare these values with values obtained for corn and distillers dried grains with solubles (DDGS).