If the Food and Drug Administration decides to ban the use of meat and bone meal (MBM) in all animal feed, as some have suggested they do following the discovery last month that a U.

• 上个月美国发现了一头染有疯牛病的奶牛，之后有人暗示说，美国食品药品管理局将禁止所有动物饲料使用肉骨粉。