Abstract
Surgical removal of the crop does not prevent the maintenance of normal body weight nor reduce food intake in the chicken when food is continuously available. However, when feeding time is restricted cropectomized birds eat less than normal. Cropectomy does not alter the pattern of food intake over 1-hr periods. The remaining oesophagus of cropectomized birds appears to function in some ways as a vestigial crop. Artificial inflation of the crop by a permanent balloon-cannula system decreases the amount eaten in a 15-min test period; increased motivation leads to increased tolerance of crop inflation. No negative after-effect is apparent after prolonged inflation of the crop.
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