http://www.k9carts.com
 
and see post:
 
http://groups.yahoo.com/group/Ferret-Health-list/message/5683  with
the homemade download-able inventive quad wheelchair.
 
(Colleen if you are here you should work up some way to have this info
also in the FML files.  I think that showing a ferret using it would be
great in "Modern Ferret".)
[Posted in FML issue 3487]