Scooter, Bert and Delores lived in here, at my old house, from about 2002-2007. It used to be filled with red apple, that succulent plant. At the time of this photo, this was just a large outdoor sun/exercise pen and they lived together in an indoor 4'x8'. There were out in it all day almost every day. Shortly after this pic, I added the rubbermaid storage shed as a night/den box and moved them outside permanently. This pen is about 10-12 feet wide and 120 feet long. The corner is a big flat spot on top and if they weren't roaming they'd hang out up there. Never had a problem with them navigating the steep hills.
http://farm3.static.flickr.com/2723/4331177033_bdde4c57c5_b.jpg
http://farm3.static.flickr.com/2723/4331177033_bdde4c57c5_b.jpg