How can i stop my dog from eating grass?Ive changed his diet ang started giving him vitamins.,But he still goes after the grass.He had a older dog who he worshiped teach him all about eating grass. aait would be ok if it was once i awhile ,but every time i have him out i have to stand over him,and tell him No.He knows what i mean ,because when i'm not looking he will try and sneak .but when i'm looking at him he pretends it isn't there. Hope someone can give me a answer. Mary Jane ( HELP )