When it comes to catnip, fresh is best! None of our toys contain pre-stuffed catnip because potency fades quickly. Instead, our cloth toys are refillable and come with a small sample of fresh, organic pure leaf and flower catnip so you can add it when you choose. For our wool toys, the natural scent of lanolin (sheep's oil) is often enough to instinctively attract your cat—no catnip required!