Proper diet formulation involves having accurate knowledge of the nutrient requirements of the pig and information about the energy and nutrient composition of available feed ingredients. In addition, it is important to realize that some feed ingredients possess inherent factors that will decrease pig growth and reproductive performance and/or impact carcass composition and quality if fed in excess.
U.S. Pork Center of Excellence
Reese, Duane E.; van Heugten, Eric; Stein, Hans H.; DeRouchey, Joel M.; Benz, Justin M.; and Patience, John F., "Composition and usage rate of feed ingredients for swine diets" (2010). Animal Science White Papers, Technical Reports, & Fact Sheets. 14.