Thanks to everyone who had (or didn't have) suggestions for a good sofa for ferrets. As far as concrete goes, my futon is already rock hard-- that's why I want a different type of sofa. Rocky used to scratch on the futon cover when he was a baby, but hasn't done so recently. He's most destructive when it comes to things that can be knocked off shelves: the bigger the noise it makes when it crashes to the floor, the better. Still in a quandary about the sofa issue. It was easier with cats--I got them a great scratching post and trained them not to scratch anywhere else and they didn't. But ferrets are much more inquisitve and much more persistent. And I think they have not nine lives but 999 lives. With all the bad things they do to themselves, it's a wonder they survive at al!. [Posted in FML issue 3760]