The only resemblance mine has to the original is the size and color.  I
thru out the plastic bottom and made a new one from wood and linoleum.
The second floor is 1/4 inch plywood with linoleum as is the 4th floor.
I modified the existing ramps to fit on the left side.  The doors were
rotated 90 degrees and the door openings made larger.  the cage is much
easier to keep clean and is much safer for the little ones.  I have
litter pans on each of the first 3 levels.  They normally only use the
one on the third.  All food and water bowls are on the third level.
 
Win and the crew of 4
[Posted in FML issue 4688]