What are animal byproducts and rendered meats?
Animal by-products are ground, rendered, and cleaned slaughtered meat carcass parts such as necks, feet, undeveloped eggs, bones, heads, and intestines (and a small amount of feathers in the case of chicken) — yes, by-products are as gross and disgusting as they sound. The quality of animal by-products is very inconsistent between batches. In many cases, by-product meals are derived from “4-D” meat sources — defined as food animals that have been rejected for human consumption because they were presented to the meat packing plant as “Dead, Dying, Diseased or Disabled.” AAFCO Definition for Meat By-Products “Meat by-products is the non-rendered, clean parts, other than meat, derived from slaughtered mammals. It includes, but is not limited to, lungs, spleen, kidneys, brain, livers, blood, bone, partially defatted low temperature fatty tissue, and stomachs and intestines freed of their contents. It does not include hair, horns, teeth and hoofs. It shall be suitable for use in animal food