An outbreak in England attributed to infected beef prompted most countries to outlaw feeding rendered cow material to other cattle because the disease is so easily spread within the same species.

在英国爆发的疯牛病归因于已感染的牛材料饲养其他牛。这促使大多数国家禁止用牛材料饲养其他牛，因为该疾病是很容易在同一物种传播。

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The United States imposed a ban on feeding beef byproducts to cattle and other cud-chewing animals in 1997, Meat byproducts constitute up to 5 percent of the poultry diet in the United States.

美国在1997年实施禁止给牛和其他反刍动物饲喂牛副产品的措施之后，禽肉的消费在整个肉产品的消费中增加了5%。

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