Abstract
THE deposition of yellow pigment in the shanks of chickens is partially inhibited by the presence in the diet of fish oils (Hammond and Harshaw, 1941), meat scrap, fish meal, or soybean oil meal (Culton and Bird, 1941). The above-mentioned findings probably explain the frequent reports of poor pigmentation in chickens fed mashes that are well supplied with sources of xanthophyll, and they also present a difficult practical problem in view of the very wide use and great importance of these feedstuffs in poultry mashes. Since it would be undesirable and, in fact, practically impossible to eliminate all these feedstuffs from poultry feeds in general, it seemed desirable to determine the rate at which pigmentation of the shanks could be induced by feeding a so-called “finishing mash” high in xanthophyll and free of the pigment inhibiting feedstuffs. Finishing and fattening mashes have been well established in poultry feeding practice for .
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