Well, the kitteh isn't here this morning :cry:
Last night I gave him food and a litter box in my tack room, but the walls don't go all the way to the actual ceiling. The ceiling is 9' and the walls on two sides go to about 8'. After I closed him in for about 10 minutes, he reappeared outside the tack room, so apparently he is an escape artist who can successfully jump down 8' from the ceiling. I didn't try to lock him in again, because apparently that wasn't going to work. When I came back this morning, kitteh wasn't here to greet me. I haven't seen him yet today.