With the Mad Cat® Tabby Taco Cat Toy, every day is Taco Tuesday for your cat! Super silly plush filled 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. Silvervine is a non-toxic.