Doberman Figure

Why does my Doberman graze so much?
She takes her heart worm medicine once a month. I feed her lunch proportional nThe day. It is always grass pastures. Some say she is missing something in her diet and others say it just loves to eat grass. I tell myself that I would ask some real dog lovers to Yahoo Answers. Thanks yall. JP
Well, if you asked my dog why he did that, I'm sure he would say 'because I can ". It has no digestive problems, no problems with its supply … he simply likes. When we go over to grandma's house and grandfather, he goes straight to the backyard of the rough, he can chew. (And it gives the stench grandfather "eye" when he mows the lawn and trims the edges of all, because there are not one of the easiest to chewing time)