There are few things more heartwarming than the sight of a beloved dog greeting you with a sweeping tail wag. We’ve all heard it: “Look at that wagging tail! He must be happy!” But what if we told you that a wagging tail doesn’t always mean a happy dog? Your dog’s tail is one of their most expressive communication tools, but a wag is not a simple translation of “I’m friendly,” or “I’m happy.” Dogs wag their tails when they are excited, curious, nervous, conflicted, fearfu