Why do dogs wag their tails?

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Images

A white retriever-terrier mixed breed dog playfully crouches with its front legs lowered and tail raised on green grass outdoors.

Why do dogs wag their tails?: Media

animal behavior

Images

A white retriever-terrier mixed breed dog playfully crouches with its front legs lowered and tail raised on green grass outdoors.

“Who's a good boy?”

This dog's wagging tail is saying “I am! And I'm really happy to see my person.”

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