My dog eats grass, why? This is something I have always wondered about. Have you? This video helped me to understand why my dog eats grass. I now understand why and will not try and stop him, I have realized their is a reason and just let nature be. I admit I tend to be somewhat of a control freak at times so when the dog would look like it was wanting to eat grass I would make him stop because I didn't want him to get sick and vomit once we got back inside. Thanks to this video I now understand why this is happening. Thanks for this information! Check it out!