The digestion of starch and protein in the pig and cattle – glands, organs, digestive juices, enzymes and end products. Bioenergetics and partition of energy within the animal. Evaluation of feeds; in vivo, in vitro and in Sacco. Use of metabolizable Energy concept in Animal Feeding. Proteins in feeds – measures of protein quality for monogastrics and Ruminants. Ration formulation and Nutrient Requirements for body functions.