As Karl Schwenke points out in his classic book in a Pig's Eye: 'Pigs are gregarious animals. Like children, they thrive on affection, enjoy toys, have a short attention span, and are easily bored.'

如卡尔什未文克在他的经典书《猪的眼睛》写的：“猪是群居动物，喜欢小孩，他们感情丰富，喜欢玩具，注意力较短，并且很容易对事情失去兴趣。”

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