Laying hens were sorted into slight, medium, and heavy groups at 25 wk based on either body weight (BW) or egg weight (EW). They remained in these groups for a 10-wk experimental period. There was no difference in egg production among the three groups. Egg weights, feed consumption (FC), and energy intake increased as the 25-wk BW or EW increased.
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Harms et al. (2000) studied this question.
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