Some of the unwholesome products that can be found in farm animal feed are meat from animals of other or the same species, meat from diseased animals, bits of feathers, hair, skin, hooves, blood, manure and other animal waste, plastics, antibiotics and unhealthy amounts of grain...On a factory beef or dairy farm, the main staples of a cow’s diet are corn and soy, which cows don’t digest well. In fact, because their digestive systems are not designed for grain, cattle can develop severe health problems, including liver abscesses and sudden death syndrome. For filler, factory farms will also add animal by-products to industrial cattle feed, and these additions can transmit diseases like mad cow to both animals and humans.
http://www.sustainabletable.org/issues/feed/
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