Canadian Brand. Silvervine is a powerful, all-natural alternative to catnip that stimulates play, curiosity, and relaxation in cats. Many cats that don’t respond to catnip react strongly to silvervine, making it an excellent choice for enrichment and engagement. These natural chew sticks provide more than just fun; they also support dental health by helping to reduce plaque and tartar buildup as your cat chews. The fibrous texture encourages natural chewing behavior while delivering a satisfying and calming experience.