The effect of diet and breed upon the oxygen requirements of the domestic fowl during the first fortnight of post‐embryonic life

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Abstract
The oxygen requirements of three breeds of fowl have been determined during the first fortnight of post‐embryonic life. It was found that oxygen uptake (ml./g./hr.) rose initially and that it became constant at a similar age for the three breeds. The diet was found to be without effect upon either the absolute oxygen requirements or the pattern of oxygen consumption. The relationships between metabolic rate, growth rate and thyroid secretion rate are discussed and it is suggested that it may be possible to predict growth rate from rate of oxygen uptake at the onset of the period of constant metabolism.