Ferrets prefer dark places to sleep, the ideal would be a sleep box with a small ferret size entrance and with a cloth flap covering the entrance. My ferrets use a very large home made wooden cage with solid floors and multiple levels and with a choice of two sleeping boxes. They will share one box or the other at different times or will sleep apart if the weather is too warm. I have found that chewing material either bedding or on a few occasions washing basket contents has been a reponse to pain. This is the same\ as the teeth grinding seen with ferrets with ulcers and other painful conditions. Tony (not a vet), Sugar and Suki. In memory of Sally and Sue. [Posted in FML 6712]