Who wouldn’t love our wacky Petlinks® Love Birds™ This Collection duo is ready to spread joy, with burlap, plush, feathers, rope and filled with Catnip & Silvervine an exciting blend that excites even the pickiest cats. Silvervine, 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. Extensive testing led us to find the perfect blend. Catnip & Silvervine was created as an ideal alternative for finicky felines who need a little extra excitement! Catnip & Silvervine is more potent than catnip and as pure as can be! Most cats respond to catnip with a burst of energetic activity followed by a calm mellow period. Our catnip is produced without chemicals or pesticides and is grown on our own catnip farms.