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得多东东我一下下也说不外来呢，你能够参考一下这个： 还有我说的牛奶是指一岁以上小孩吃的全脂奶。配方奶没有用过，是甚么状况不知道。
Under USDA regulations, all organic livestock must be fed a diet of “agricultural products…that are organically produced and …organically handled.” This usually means that organic cattle eat grass or organically grown grains that are not sprayed with synthetic pesticides, fertilizers or other chemicals. Most cattle raised on traditional feedlots eat mainly corn and soybeans. According to Weber, cattle and other ruminants are designed to eat grass, but those that eat grains have been found to have more E. Coli bacteria in their intestinal tract and feces, which can contaminate meat with the deadly bacteria during slaughter. Unlike conventionally raised livestock, organic animals are not fed plastic pellets, formulas containing urea or manure, or slaughter by-products, as stated by the USDA.
Additives
Since so many animals live so close together on CAFOs, disease can spread quickly; therefore, farmers must dose each animal with antibiotics to prevent them from getting sick. According to Walsh, increased use of antibiotics on farm animals leads to antibiotic-resistant strains of bacteria that can be passed to humans. Organic cattle don’t need antibiotics, because they don’t live in such tight quarters. USDA organic standards prohibit the use of any medical treatment given to animals unless they are sick, including antibiotics and synthetic parasiticides. Organic farmers and ranchers are also prohibited from giving their animals hormones or supplements to promote growth, as conventional feedlots often do in order to make their cattle grow faster, so that they can be slaughtered sooner, which lowers the cost of raising them. According to Weber, ingesting hormones from meat can lead to hormonal imbalances that may cause cancer.
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