The commercial egg layer has been selected to efficiently produce eggs. Therefore, it eats feed to meet its daily energy requirement. Factors such as temperature, energy content of the feed, breed as strain of the hen, and rate of egg production affect this requirement. The energy-to-amino acid (methionine) ratio in the Harms-Faria formula makes corrections for these differences. The hen adjusts her feed intake to compensate for differences in energy content of the diet. There is a 1% increase in feed intake for each 14 kCal per pound decrease in ME content of the diet. The broiler breeder does not have the ability to control feed intake for efficient egg production. Therefore, her feed intake (energy) must be controlled to control body weight. She must be weighed at regular intervals to attain this goal.
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