Thanks Phlip & Christianna for the info on catnip! :-) Phillipa I wonder then, why cats don't go crazy over other mints? << Catnip is not poisonous to humans. It's a plant of the mint family- any mild mint should suffice. If I were subbing, I'd go with a balance of a good mint, and sage- catnip has, to me, the flavors of sage. Phlip >>