Another theory is that breeds of cows raised in pastures have tougher intestines compared to corn fed cows due to the ingestion of the occasional rock and dirt from the field.

• 另一种看法是，在牧场生活的牛相对于用谷物喂养的牛具有更好的肠子，因为前者会偶尔社区一些土地里的石子和脏东西。