The scientists compared the number of injuries,which usually occur while scrambling for a feeding position,and the weight gain of the piglets which were provided with plastic plates,foam mats,waterbeds,straw or concrete.

• 小猪常常会为了吃东西抢个好位置而受伤。科学家们分别比较了小猪生活在塑胶垫、泡沫垫、水床、干草和水泥环境中受伤和长胖的几率。