Most of what makes up commercial dog food comes from the rendering plant. Rendering is a process and to extract oil from fat, blubber, etc., by melting. livestock carcasses. When chickens, lambs, cattle, swine, and other lifestock are slaughtered for food, usually only the lean muscle is cut off for human consumption. The remaining 50 percent of a carcass becomes \"meat-and-bone-meal\" or \"by-products.\" Dog food is basically lungs, ligaments, bones, blood and intestines. Rendering is not limited to the \'healthy\' livestock. Consider the following things that go through the rendering plant and end up in commercial dog food: - Spoiled meat from the grocery stores and resturants, styrofoam wrapping and all - Road kill that can\'t be buried on the roadside - The \"4 D\'s\" of cattle: dead, dying, disease and disabled - Rancid restaurant grease - Euthanized companion animals (also, known as pets) Dead animals from cow pastures may not be rendered until up to a week after they are dead. It\'s estimated that E. coli bacteria contaminate more than 50 percent of these animal carcasses. The rendering process destroys the bacteria, but it can not eliminate the endotoxins bacteria. These endotoxin, which can cause sickness and disease, are not tested for by pet food manufacturers. At the rendering plant, all of dead animals, plastic bags and all, are tossed in a huge vat and shredded. Then it\'s cooked at 220 to 270 degrees for 20 to 60 minutes. After it cools, the grease or \"animal fat\" is skimmed off the top. And the remainder is pressed and dried and ultimately labled as \"meat and bone meal\" on the dog food package. Dogs would never eat this toxic mess in the wild, so the smell of animal fats is sprayed on the dry, bland \"dog food\" to trick the dog and make them appetizing. These \"natural flavors\" usually come from rendered restaurant grease, animal fat, or other oils unfit for human consumption. Huge conglomerates use pet food companies as a cheap, profitable, way of disposing of the waste from their human food companies. Nesle owns: Alpo, Fancy Feast, Friskies, Mighty Dog, Purina One Heinz owns: 9 Lives, Amore, Gravy Train, Kibbles-n-Bits, Nature\'s Recipe Colgate-Palmolive owns: Hill\'s Science Diet Proctor & Gamble owns: Eukanuba and Iams Mars owns: Kal Kan, Mealtime, Pedigree, Sheba, Waltham\'s