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.
Sometimes but if one uses a comma in a question here it gets automatically removed. Yes, while I am answering this question, you will be reading the answer. This is an example sentence.
What happens when chicken bone gets stuck in gas tank
A wishbone is a bone that is found in a chicken and turkey. People use the bone to make a wish. Two people hold one side of the bone and whoever gets the smaller piece of bone is the winner and gets to make a wish.
How angry Hera gets! This is an exclamatory sentence.
It is called dislocation
they get hurt
The bone is called the humorous, and since humor means funny, the funny bone just caught on.
Exclamation.
The cannon bone of a horse's leg is affected when they get bucked shins.
it doesnt fly
The joint has been dislocated.
yes