Goats like it best when you smile, new research shows

You should be happy when you meet a hoofed friend. Especially if that friend is a goat. 
Because, it turns out, goats can read human moods and are more drawn to people who look happy. 
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According to a new study recently published in the journal Open Science, goats prefer "positive human emotional facial expressions." That's smiling faces, to you and me. 
Researchers set goats free to explore a closed-off test area with