Here is Cisco with his food ball. It has a hole that is not adjustable. I just put larger pieces of milk bone in thru the other side where I can open it and then put his kibble in. The larger pieces of milk bone won't allow the kibble to fall out so easily. He will even get this ball on the couch and drop it to the floor knowing that it may bang a piece out of the ball. This toy is tons of fun!!