I heard about that a lot lately, obviously it has a very positive effect on cats. Now I'm thinking about trying this with Lily because I think one of the reasons she's bullying Luna is that she is bored and unchallenged. Lily is a smart girl, and maybe she would enjoy learning something new. However, I have no idea how to start. lol There are several books on the market and I think I will order one of those. Hope Lily will like the training.