My cat goes crazy for catnip! He especially likes fresh catnip, which I buy every weekend -- in the summer -- at the local farmer's market. I keep it in the fridge, and every time I open the door he runs over to the kitchen expectantly! I'm happy that Leon is one of the cats who *does* respond to catnip, because I love seeing him so happy eating it, rolling around in it, and just generally loving it!