I've been looking at web sites for cat condos, climbers, trees etc. Do any of you have any experience with these things? Bailey climbs on bookcases and dressers, but sometimes I feel guilty that she isn't getting enough exercise. (Hence my inquiry earlier re getting a second cat, which I will probably do fairly soon.) I have the feeling that these cat climbers, etc. may be to make the owners feel better, rather than the cats. I'd be afraid of putting a lot of money into one and having Bailey turn her nose up at it.