Porter and colleagues (1981) found that when spiny mouse pups (Acomys cahirinus) are released into a test arena, they often huddle in pairs. Further, they will sometimes prefer to huddle with nonkin rather than kin. This is most likely to occur if

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Spiny mouse pups are more likely to huddle with nonkin rather than kin if they are unrelated young that were reared together. This behavior suggests that the social bonds formed through shared experiences and rearing environments can be stronger than genetic relatedness in determining social preferences for huddling partners.

Porter and Colleagues (1981) Found That When Spiny Mouse Pups