Your idea of an enclosure is a good one if you can get it built. I have one outside a spare room with a cat flap installed in the window. The room is totally furnished for the cats, with 3 cat trees, a big cage, several beds and a bunch of toys. The enclosure has a small kids playhouse, several shelves and scratching posts, and 2 big plants to hide in. I have 8 formerly stray cats. A couple are still getting acclimated to living inside, so they can get out when they feel the need.

Eventually I hope to get them all adopted to good homes.

Unfortunately, they don't get to wander the rest of the house because of my dogs.

Mary