Meat is the clean flesh of slaughtered cattle, swine, sheep or goats. It may be only stiated skeletal muscle, tongue, diaphragm, heart or esophagus, overlying fat and the portions of skin, sinew, nerves and blood vessels normally found with that flesh. Meat by-products are the clean parts of slaughtered animals, not including meat . It does include lungs, spleen, kidneys, brain, liver, blood, bone, partially defatted low temperature fatty tissue, and stomachs and intestines freed of their contents. It does not include hair, horns, teeth or hooves.
Meat meal is the rendered meal made from animal tissues.
It cannot contain blood, hair, hoof, horn hide trimmings, manure, stomach or rumen contents, except for amounts that may be unavoidably included during processing. Meat and bone meal is rendered from meat, including bone, but doesn't include blood, hair, hoof, horn, hide trimmings, manure, stomach and rumen contents, except small amounts unavoidably included during processing. It does not include any extraneous materials. No more than 14 percent may be indigestible residue, and no more than 11 percent of the crude protein may be indigestible. Poultry by-products are clean parts of slaughtered poultry, such as heads, feet and viscera, and must contain no feces or foreign matter except in unavoidable trace amounts.