What's the beef you all have with upper levels? I've read a few posts where people have said upper levels don't count, and then there's the big deal about ramps taking up space, when they only really take up a small amount of space near the bottom that's too small for the piggie to climb under. I think having a second level would make the bottom level seem more favorable to them since they would be covered overhead, thus feeling more secure. Also, some people have significantly sized upper levels, so why shouldn't those count in the overall square footage of the cage? An upper level is a great way to make a bigger cage when you don't have much space to utilize in the first place. I don't have a second level, I'm just curious why it seems like most people here try to discourage it. I'd think anything you can do to convince people to make their pigs cage bigger would be a good thing, especially for those who either don't have the space or are reluctant to use it for Guinea Pigs.