Petlinks Wild Wooly long tailed mouse is a cat toy that is weighted to replicate dead prey, satisfying your cat's natural instinct to hunt. Long jute rope tail, long faux faux fur and feathers make this mouse toy irresistible to cats. This mouse toy is filled with HappyNip which is an exciting blend of silver vine and catnip. Silver vine, a wild-growing herb foraged in the mountains of Japan and China, has a strong natural effect on cats, even some that don't respond to catnip. After extensive testing to find the perfect blend, HappyNip was created as an ideal alternative for finicky felines who need a little extra excitement! It's more potent than catnip and as pure as can be! Most cats respond to catnip with a burst of energetic activity followed by a perfectly calm mellow period.