Where I use to live, I had a large cage (6ft high x 4ft wide) built and attached it to a window so the ferrets could go "outside" whenever they wanted. They were free roam inside but for caged ferrets it would be possible to attach a cage both inside and outside the window so they could have the comforts of whichever they prefer at the time. Before the large cage, we had built a smaller one around the outside of the window. Either way, the opening to the outside secure must be absolutely secure so they don't get out and you need easy access to the outside cage for cleaning and in case a little one needs help. Currently I have an enclosure built onto the back of the house on the patio, with the back door leading out to it and it a ferret door in the back door and screen so they have access 24/7. It's 15ft x 12ft x 6ft high fully enclosed including the top. I used screen and welded wire - aluminum screen to keep out bugs out and welded wire to keep ferrets in. Over the top and 2 sides I have shade material to keep the area from direct sun. The enclosure is equipped with a picnic bench for me and the ferrets and plenty of ferret furniture too. hugs to all. tle Troy Lynn Eckart Ferret Family Services http://www-personal.ksu.edu/~sprite/ffs.html http://www.geocities.com/Petsburgh/Haven/5481/ Please sign up to support our charity http://www.iGive.com/html/ssi.cfm?cid=46&mid=58395 [Posted in FML issue 3799]