The other cats, when the newbies slink down to the lower levels, look but don't touch. Tanya occasionally growls, very softly, if someone examines her too closely and she has no line of retreat, but that's about it for declarations of hostility. T&T spend most of their time under the beds on the top floor. Sometimes they venture to the lower levels. I've found one or the other huddling in my bedroom closet, well-concealed by hanging clothes, and been able to do some chin-scratching then. (They like it, yet still they scuttle away from me when I cease cornering them. Oh, well.) Tanya's also occasionally tried hiding under a bureau, or even behind the cluster of plants next to the second-floor slider. But mostly the third floor is theirs.
Unfortunately, that means that the residents have stopped using the litterboxes in the bathroom off the third-floor bedroom, formerly their preferred facilities, and now focus on the temporary setup in the living room. UGH! I've moved a couple of boxes down there and regularly clean them, but it is NOT PLEASANT. Tomorrow I'll be checking the behind-furnace holes, to see if the foam I sprayed in yesterday has filled them. I've also devised ways to block off the hidey-space behind there and other places where T&T could huddle beyond my reach. Tomba can have the under-shelf corner in the basement where he first hid, if he likes; but I'm not letting them have anywhere that's inaccessible.
Assuming I get the basement cat-hiding-proofed to my satisfaction, the litterboxes will be going down there tomorrow. None too soon!
Oh, yeh, also: Twice I've been able to get hold of Tanya and drag her passively resisting body into my lap for some loving. She does push her head into the skritching; she does purr at times; but she also wants to ooze free, and scurries away when I release her. That's all right; she'll come around eventually. The wary Tomba isn't ready for that much enforced affection yet.