Mad Cat wild and wacky cat toys are sure to drive cats crazy! Filled with our powerful Silvernip blend of North American catnip and potent silvervine for the ultimate play experience. Silvervine is purrfect for cats that don't react to catnip due to its unique cat attractants. Among cats that don't react to catnip, 70% love silvervine! That's why cats go mad for Mad Cat! 100% Silvernip filled! Potent Silvernip blend with 7 cat attractants! Size (Approximate): 15cm x 9cm