Treat Dispensing Dog Toys, Dog Treat Toy, Dog Enrichment Toys for Large Dogs, Interactive Dog Toys for Small Dogs, Dog Puzzles for Dogs Blue

Dogs don't learn anything from these dispensers except to roll it around until food falls out but it slows down their eating and gives them some activity which is what mine need. It's very difficult to move the adjustment switch, so it's probably going to be sitting at one spot instead of changing or maybe I'll try a little olive oil on it. Very sturdy plastic and seems to be something difficult to destroy.