Agricultural Extension Service, South Dakota State College
Feeding poultry for profit involves essentially the use of top quality stock, proper management and care, proper facilities, and last, but certainly not least important, a good feed. The feed accounts for well over 50 per cent of the cost of poultry, meat and egg production, hence its importance cannot be considered lightly. A good feed supplies all of the essential nutrients in the required amounts for each type of production.
Hart, Glen and Carlson, C.W. Dr., "Feeding Poultry for Profit" (1954). SDSU Extension Circulars. 697.