Your cat won't be able to resit chewing on this cat chew stick. Made from silver vine. It is used in Japan and China as a cat stimulant. When exposed to powdered silver vine, cats enter a euphoric state that involves behaviors like rolling, chin and cheek rubbing, meowing, drooling and licking. Bottom line, is that cats go nuts for this stuff. Reactions vary from cat to cat. Effects usually last from 5 to 30 minutes. Chewing on this stick will also help clean kitty's teeth.