most of the material that is removed in a primary commercial dressing is not disposed of, but is processed or sold individually. this includes some of the organs such as the liver, kidneys and even tongue. other parts that may be sold for human consumption include chitterlings, tripe, brain, and feet, such as pig's trotters or chicken feet. in some countries, there is an excess supply of these internal organs versus the demand for them, so they will simply be used as a byproduct food. the bone is pulverized to make bone meal, and like much of trimmed material, is used for animal feed, such as dog food. these items are not counted toward the dressed weight, which is focused primarily on the more desirable meat tissues.