A couple of the dogs who have owned me, Max and Penny, would eat grass now and again, each time it seemed to make themselves vomit.
Bob now is a real grazer, everytime he is out, for a walk or in the garden, he will find himself some grass to chew. Not any old grass either, it has to be a certain kind and he will look around until he finds it. What kind it is, or why, I don`t know, only he does and he is not telling! Doesn`t make him vomit though, he just seems to like it, always has, ever since he was a puppy!