Classification and chemical value of animal feeds, dry forage and roughage, pastures, range plants, silages, energy contribution fees, protein supplementary feed, minerals and vitamin supplements, and feed additives; Chemical composition of feeds; biochemistry of feed constituents; Analysis of feeds- proximate analysis scheme, Van Soest and Moore systems; Stock-feed manufacturing and legislation in the animal feeds industry legislation, improving forage feed value; Digestibility will feedstuff; Biochemical theories of voluntary feed intake; Kinetics of digestion and passage ; and Metabolic functions and roles of micro nutrients (vitamins and minerals).