The Mad Cat? Sasquatch Catnip & Silvervine Cat Toy Twin Pack is an adorable plush-filled sasquatch-shaped cat toy with a unique blend of premium catnip and silvervine that's maximum potency, pure, and pesticide free. Silvervine is an all-natural catnip alternative that cats love, it elicits a similar reaction to catnip and works for many cats who normally are not affected by catnip.?Some cats LOVE catnip, but not all cats are affected by it. To solve this problem we developed our own unique blend of catnip and silvervine. Silvervine is a non-toxic, all-natural catnip alternative that many cats prefer. This potent stimulant elicits a similar reaction to catnip and is both safe and fun.