OUR NARWHAL WITH SILVERVINE STICK WILL TAKE CATS ON A FANTASY ADVENTURE! Cats will be leaping, kicking, and pouncing for joy as they chase this NARWHAL ENTERTAINS YOUR CAT! Filled with a custom blend of tempting catnip and silvervine for twice the cat attractants, plus fun crinkle for enticing sound. Silvervine is an all-natural catnip alternative that cats love, it elicits a similar reaction to catnip, and works for many cats who normally are not affected by catnip.