Is it okay that my dog eats grass?

There's a lot of speculation about why dogs eat grass. Among them are such explanations as help for an upset stomach, missing greens, they like the taste and more.But no one knows why for sure. Eating grass that is chemical free won't hurt your dog. But if s/he vomits often, have your dog examined by a vet to make sure there are no underlying medical reasons for the problem.