I have a young ferret, Loki, that is resistant to box training.  I built
her a multi level wooden 'bookcase' style cage.  For the first 2 weeks I
contained her to the lower 2 levels.  She began to use the box nearly
everytime.  Today I gave her access to the upper levels and the training
went right out the window.  She will not travel down to eliminate and there
is not room for a box on the upper most level.  Any ideas?  I do plan on
lining the floors with a rubber mat to prevent odor from staying with the
wood.  I have found Home Depot sells the liner that goes beneath a shower.
[Posted in FML issue 2944]