Starmark Treat Dispensing Bob-a-Lot

Same idea as a wobbling dispenser, with one important extra: the opening adjusts, so the difficulty grows with your dog instead of you buying a new toy. Set it wide for an easy first session, then close it down until each piece of kibble takes real nudging. The large size takes about three cups, enough for a big dog's whole dinner. It is plastic and noisy on hard floors, and the yellow top is the part a frustrated dog tends to gnaw, so take it away if play turns to chewing.