Dog Facts 212
For dogs, it seems the tail wagging is the most natural thing in the world. However, while most people believe that a dog’s tail wagging is a signal of happiness, this is not always the case. When a dog wags his tail, it can mean a number of things, from fear to aggression. A vertical tail often means that a dog feels dominant or frustrated, and is probably not safe to approach. In contrast, a low tail wag usually indicates fear or submission.
The exact numbers are difficult to calculate, but most sources agree that there are, at the very least, 400 million dogs in the world. About 70 million of those dogs live within the borders of the United States, alone.
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