Abstract
An experiment was conducted to evaluate the response of heat-stressed hens to increases in dietary calcium at two protein levels. Criteria evaluated included feed consumption, energy consumption, egg weight, egg production, egg specific gravity, and calcium and phosphorus solubilization and excretion. There were no effects of different calcium levels on egg production or egg weight. Increasing dietary calcium from 3.5% (2.9 g/hen/day) to 3.9% (3.2 g/hen/day) significantly increased egg specific gravity. Further increases in calcium intake however, did not improve egg shell quality. Protein level had no influence on egg production or egg specific gravity.
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