Relation of the Protein, Fat, and Energy of the Ration to the Composition of Chickens

IN THE course of an investigation by Fraps and Carlyle (1939, 1941, 1942), on the utilization of the energy of feeds by growing chickens, a number of rations were used which are not ordinarily tested in experiments with chickens. These rations had some interesting effects upon the growth of the chickens and their chemical composition, especially on their fat content. EXPERIMENTAL METHODS The methods will be described only as they relate to the results here presented. Baby chicks were fed upon a corn meal ration for a week, after which five groups of equal average weight were selected. Four of the groups of six chicks each were placed upon experiment, one group was analyzed, and others were used for digestion experiments. The chicks were fed individually in battery brooders and weighed weekly. At the end of the experimental period they were killed, the contents of the intestines removed and the . . .