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Why do Dogs Wag Their Tail?

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Why do dogs wag their tail? Do dogs wag their tail because they are happy? My dog wagged his tail right before biting someone

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Why do dogs wag their tail?

Does a wagging tail mean my dog is happy?

Why do Dogs Wag Their Tail?
A dog’s wagging tail does not indicate that they are happy, friendly, or want you to say hi to them.
It does however indicate a willingness to interact. But, there are lots of different types of interactions. Jumping up and nipping someone is a type of interaction, biting someone is a type of interaction. Growling at someone is an interaction. Even if your dog is wagging their tail while they are jumping, biting, or growling, it does not mean they are happy or friendly.
I could write 5 pages about different types of wagging tails (and bore you all to death in the process) but instead I thought I would summarize quickly.
A wagging tail is NOT an indication of a happy dog.
If you want to know if your dog is actually happy or friendly it is much more effective to pay attention to their overall body language. If their body is loose and wiggly (with lots of curves and “C” or “S” shapes) while not being pressured into an interaction, chances are much higher that they are happy and/or friendly.


The Bottom Line:
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