way to observe self-aware behaviors in animals. When pigs are presented a mirror, they do repetitive movements, a behavior called contingency checking. Moreover, they are able to locate food using the mirror.

Social intelligence

Pigs can remember which humans and pigs they like and act accordingly. They differentiate humans, even people dressed alike, by recognizing human faces, and can also tell apart humans by their olfaction and hearing. Pigs have been shown to fear strangers but to have lost that fear after the person played

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