Here's a site that shows a wonderful cat enclosure, though if an
enclosure is built on dirt I'd recommend wire a few feet under the dirt
since ferrets like to dig, with the wire running under the panels and
attached on the outsides.
http://www.lightheartedpress.com/cat_enclosure.htm
 
Ms. Troy Lynn Eckart, F.B.S.
Ferret Family Services
http://www.ferretfamilyservices.org
http://www-personal.ksu.edu/~sprite/ffs.html
http://www.geocities.com/Petsburgh/Haven/5481/
Please sign up to support our efforts
http://www.iGive.com/FFS
[Posted in FML issue 4950]