I've seen the Kritter Kages in person, and they certainly look well made and
very sturdy.
 
My only concern is that some of the fancier models have turrets and tubes
where a ferret can make him inaccessible to you.  And that is just where the
little fert is sure to go when you need to get to him in a hurry!
 
Linda Iroff
North Coast Ferret Shelter
http://www.oberlin.edu/~liroff/ncfs.html
[Posted in FML issue 2207]