The Dog Rumble Puzzle interactive dog ball puzzle toy from Nina Ottosson by Outward Hound is two toys in one It includes a treat ball and maze ball for extra enrichment and extended play, keeping your dog busy and mentally stimulated This interactive dog ball provides both physical and mental exercise, making it a fun way for your dog to practice its problem-solving skills The Dog Rumble Puzzle can also be used with a standard 25 tennis ball or Outward Hounds medium-sized Squeaker Ballz tennis balls This Level 1 puzzle is fun for all dogs regardless of age, size, or breed SAFETY AND cARE: Always supervise your dog closely, teach your dog how the game works Do not leave your dog alone with a treat puzzle, do not let your dog chew on the game or pieces Inspect for damage and remove if broken For dogs only, not a childrenAs toy When empty, store until next supervised use