Hey Bob, did you put these in the corners of your house?
Ferret litter trays, let them poop freely with no messy cleanup!
http://www.ferretdepot.com/Merchant2/graphics/00000001/PB100.jpg
This was in the eighties.
From what I recall I would try various litter boxes,paper ,etc and she would always go just outside what ever I put there.
Always came when I called though and I would take her for walks.
David Carradine had a ton of them back then.
you bastards… i am still getting calls… LOL