These Eco-Kitty Peacock Feathers on Silver Vine Wand is made of natural and unprocessed Silver Vine stick and feathers. Silver vine is known to improve physical health and emotional state. Guaranteed hours of fun! Silver Vine has been used for many years for its health benefits. The ecstatic response to Silver Vine by cats makes a good alternative to catnips. Silver Vine has a more potent fragrance that is guaranteed to stimulate and excite cats.