Poultry Byproducts

Poultry feathers are virtually indigestible in their natural state, and disulfide bonds in feather keratin must be destroyed before the protein can be used by animals. The most widely used commercial product is hydrolyzed feather meal, which is deficient in methionine, lysine, histidine, and tryptophan, but rich in many other AA. Poultry by-product meal consists of the ground, rendered, clean parts of slaughtered poultry, exclusive of feathers. It has a good AA balance and is a good source of minerals and vitamins. Dried poultry litter from caged layers or broiler operations is not suitable for nonruminant species because of the nonprotein N content, and neither of them is permitted to be fed to lactating dairy cows, but they can be used as a source of N for ruminants under some situations.

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