My new puppy inhales his food. I saw these bowls at the pet store that have extrusions in the middle so the dog has to eat around it. Do they work well? I added a large candle in a glass jar in his bowl. It does slow him down a bit, but after awhile it begins to move to one side of his bowl. Is there any prevention methods I could try? I think he does this because he does not realize food is readily available at my house yet. He may still have his fighting for food instinct intact from the litter, and the people I rescued him from did not feed him properly. When I got him he had bad tape worms and exposed hip bones. I have had him since Friday. What do you guys / gals think?