The Ocelot, Serval, and Leopard were rubbing it on there faces and rolling around in it. Haha, I guess there still is a little domestic cat in them.
It has something to do with your own internet safety-settings. If you hit the "reply with quote" button you'll see the link about the catnip; Apparantly size doesn't always matter
A number of zoos actually use such herbs (and also commercial perfumes) applied to parts of an exhibit to stimulate activity of some cats.