Composition of feather and offal meal and its value as a protein supplement in the diet of broilers

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Abstract
Two experiments are described in which feather and offal meal was included at levels of 0, 3.4, 6.8, 10.2, 13.6 and 17.0% in the diet of broilers. The feather and offal meal was used to replace Peruvian fishmeal as the main protein source, the highest level replacing all of the Peruvian fishmeal.The feather and offal meal was poorer in lysine and methionine content but richer in cystine than Peruvian fishmeal. The batches used were relatively homogeneous when assessed by chemical analysis and had metabolisable energy contents of 3350 and 3340 kcal/kg, respectively.Feed intake was depressed at the 17% level of inclusion of feather and offal meal in the first experiment and at the 13.6% level in the second experiment.The data from both experiments showed an optimum efficiency of feed utilisation at about the 10% level of inclusion in the broiler diets.