To keep litterboxes outside the cage in place, first get two litterboxes
just alike that will stack inside each other.  I use the small Van Ness
rectangular cat pans.  I put a small screw through the side of the first
pan and into the base board.  Then the second pan sits inside the first
so it can be easily removed for cleaning.  I also put a piece of plastic
carpet runner underneath for those near hits.
 
Even Lucy, who overturns everything, hasn't managed to turn the pan over
when it's fastened down this way.
 
Terri
[Posted in FML issue 3603]