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albumen amino-acids amount animal protein antibiotics antioxidant barley berry birds bone meal Breeders breeding broiler calcium carbohydrate carcass cereals chicks choline colour compounds contain cooked coto crude protein cystine Deficiency Symptoms dextrins digestible dried grass ducks and geese effect efficiency of food egg production energy diet enzyme essential amino-acids faeces fatty acids feeding fish meal fowls and turkeys glycine grain growth rate hatchability ig/g increase indigestible organic matter intestine IU/g Layers lb maize meal leucine lignin limestone liver meal liveweight lysine maize maize gluten manganese mash metabolism methionine nicotinic acid nitrofurazone nitrogen nutrition oviduct pellets perosis phosphorus potatoes poultry poultry diets poultry food poults Premix protein protein content rancidity ratio reduced requirements riboflavin rich rickets salt seeds shell soluble Soya-bean meal species starch substances sugars supplements TABLE toxic tryptophane turkeys vitamin Bi2 Vitamin D3 weeks wheat yolk