Hi, I can't see why woodstove pellets would be a problem, and don't think it would smell too bad either. I have heard a lot of good things about the corrugated black plastic ferret size drainage tube being used as a transport for ferret through ffz zones of people's homes. As far as the defunct doogie door, an acessesible outdoor cage would be a good idea, especially a sandbox and toys so they can dig. Maybe they will even use this as a regular litterbox and will not poop in the house!!!!-(yeah right!!! :-) } Prove that and I'll drive to Europe!!! Anyway's, its a good idea as long as in the winter they will be able to get back in when they get cold. Sincerly, Max Holmquist [Posted in FML issue 1750]