The Piggy Poo and Crew Pet Food or Treat Popper Game can stick to any smooth slick surface. This popper works for pigs and other pets. Pigs can use their snout and press the popper down and dogs can use their nose or paw. If a pig is using this popper since they have such a strong snout we recommend sticking this horizontally so they do not try and knock it over. This popper does take some training to figure out. Try placing food and treats around it in the beginning.