Dogs may not seem terribly bright when they’re chasing their own tails, but in many ways they are clever creatures. In particular, they are very socially aware, both of humans and of each other.
Many studies have reported that they can sense human emotions. Recent research has found that they can tell the difference between happy and angry faces, and even show jealousy.
It now seems that they can sense when a person is untrustworthy. Once a dog has decided a person is unreliable, it stops following the cues they give.
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