I'm sorry, I don't have advice on enclosures. Our yard is not fenced and we live on a private driveway. Pinot has been trained since day one to stay in the back garden mostly, with trips around front to sit in the sun, but has never been enclosed (although we are always with her when she goes for a "romp"). It works rather well. I don't think you can train after the fact, though, so an enclosure is probably best. Let us know! Thanks for the pictures, too! Pretty kitties!