No
A dog wags its tail and the tail wags the dog.
It's tail.
A dog is a house pet that wags its tail as a form of communication, usually to express happiness or excitement.
voluntary
When a dog wags its tail in a circle, it typically indicates excitement or happiness. This behavior is a sign that the dog is feeling positive emotions and is likely in a playful or friendly mood.
it wags its tail and barks
There are no statistics as to the number of times a dog wags it's tail in a lifetime. Different breeds wag their tail either a little or a lot. It also depends on the longevity of the dog.
A story about the part of a dog that wags is often referred to as a "tail" tale. This playful pun combines the word "tail," which is the part of the dog that wags, with "tale," meaning a story. Such narratives can highlight themes of loyalty, joy, and companionship associated with dogs.
"The dog wags the tail, but the tail don't wag the dog." -Arthur Ashe 1989
It means they are content or happy.
A dog wags its tail
No. No need for a coma with this sentence. You forgot some ' though. Should be-Mervin's dog wags it's tail when it gets a bone.