How does my dog know to look at my face?

[foal]

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I forget which animal it is, but upon encountering it, the last thing you want to do is look it in the eye for this will cause it to attack.

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I'm going to guess that it tends to be prey rather than a predator? I think prey animals tend to be more averse to being starred at in the face. I know I've heard of some bird species that definitely don't like this.