These three Treat Locking Discs connect to make a dog treat dispenser puzzle like no other! Able to fit most treats, the Treat Locking Discs are made of soft plastic with prongs that lock together to make the puzzle more challenging. A perfect enrichment game for your pup to practice its problem-solving skills. Watch as your dog rolls the discs around to unlock them and dispense the treats hidden inside. This dog treat puzzle is perfect for nose work and scent games and keeps your dog occupied and engaged.