Petmate 54902 Wobbling Treatball Dog Toy, Green/Purple Wobbling treatball dogs toy Wobbling treatballs are a trio of brightly colored wandering snack machines that are bound to give pups a fun challenge The slightest touch puts the toys in motion while their weighted bottoms help them to pop back to the upright position The opening easily adjusts to accommodate the size of treats being used Available in green/purple color, useful for dog only