Aphagic chickens have been produced with electrolytic lesions placed stereotaxically in the diencephalon. These chickens were maintained by introducing food into their crops through a tube. They were inactive and lost much of the ‘nervous’ temperament of White Leghorn chickens. One or more of these chickens showed additional disturbances: impaired gastrointestinal motility, temperature regulation, adipsia and abnormal body composition.
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Feldman et al. (1957) studied this question.