Appetite, as an indicator of physiological needs, has been minimized by many investigators in the field of human and animal nutrition. From the beginning the whole animal kingdom h.as been controlled in its feeding problems only by appetite and environmental limitations of the food supply. Consequently, even tho the role of appetite be not of great importance under artificial experimental conditions, yet, if the broad facts of the case, the continued existence and multiplication of man and other animals, after countless aeons of feeding with appetite as their sole guide, be taken into consideration, it must be recognized as of some value.
McCandlish, A. C.
"Appetite as a guide in feeding dairy calves,"
Research Bulletin (Iowa Agriculture and Home Economics Experiment Station): Vol. 4
, Article 1.
Available at: https://lib.dr.iastate.edu/researchbulletin/vol4/iss51/1