TheĀ Define Planet Silver Vine Dental SticksĀ are completely natural and unprocessed.Ā Silver vineĀ is known to produce a euphoric response in cats even stronger than that of catnip. TheseĀ dental sticksĀ are sure to keep your cat relaxed, stress-free, and even keep hisĀ teethĀ clean as heĀ chews.