Hook the Fat Cat CATFISH Doorknob Hanger around any doorknob in the house, and let the fun begin! The four dee-lux Kitty Lures at the bottom of the Tug n Pull legs are irresistible to kitty nostrils. That's because they are packed with the world-famous Zoom Around the Room high-test organic catnip! Tug n Pull legs elastically extend up to 30cm.