海豚是一种群居性动物，会通过尖叫声和呼噜声相互沟通。
Dolphins are social animals that communicate with each other through squeaks and grunts.
群居性动物会做出两类决策：群体单一选择的共同决策，寻找住处的石蚁决定在哪定居就是这类决策；
Animals that live in groups make two sorts of choices: consensus decisions in which the group makes a single collective choice, as when house-hunting rock ants decide where to settle;
这包括把它们豢养在更符合要求的笼子里，允许像狗这样的群居性动物能生活在一起，并且努力降低这些动物生活的单调枯燥程度。
This includes keeping them in more suitable cages, allowing social animals like dogs to live together and trying to reduce the boredom that these animals can experience.
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