Petsport Mouse Balls are way cuter and less mess than real mice, but just as satisfying for your cat! Each ball features a fluffy, easy-drag tail, “nuclear strength” catnip oil, and a jingle bell rattle that drives cats wild with excitement while promoting healthy play and exercise. Nuclear strength catnip drives cats wild. “Mouse flavored” balls with fluffy tails. Jingle bell rattle promotes play and healthy exercise.