Adequacy of Simplified Rations for the Complete Life Cycle of the Chick

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Abstract
Four successive generations of chicks have been reared on simplified rations. All chicks grew rapidly. The males were normal in appearance throughout the period of observation but their fertility was low. The females were normal until they attained maturity, and their egg records compared favorably with those obtained under normal conditions. After periods of intensive egg laying the mortality of the hens was high. Data published by other investigators indicate that the low fertility of the males and the high mortality of the females can be explained by the fact they were reared under laboratory conditions. If this explanation is correct the simplified diets are complete in all respects.

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