It is generally between 15% and 19% crude protein depending on the number of eggs being produced, age, feed intake and whether hens are moulting or not. Layer feed is often made up of protein sources such as legumes.
IN order to make a phase feeding system practical, it is necessary to know the laying hen’s daily requirement of protein during the various parts of her production cycle. Heywang et al. (1955) noted that the optimum level of protein for layers was 15.0%.
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