The saga continues. It turns out that, as I have always suspected, Smidgen is a sulker. Big time. He is put out, and he does not have his 'mother' to protect him. This has been exhibited in the past. When in kennels he spends the day with his head inside the cat cave and his (very broad) rump prominently displayed in a hump. Esther has always been his front person. He comes out after dark (they monitor them on infrared cameras) and eats, drinks and interacts with neighbours normally, but if humans are around he sulks.
The same is happening now, but he does not have anyone to back him up.
This morning I had to go into the History Room where I volunteer. The plan was I would leave Smidgen and Billy with the run of the rear third of the house so they could get to know each other. Sebastian was to be kept in the front third of the house so there were two doors between them. Smidgen got wind of this plan and rapidly retreated to the top of the wardrobe in the bedroom so spent the day with 'his' dog rather than Billy.
This afternoon when I got home I shut him in the laundry and opened the door into the bathroom. He disappeared under the hot water cylinder and refuses to come out. Billy is bemused. He is not an aggressive (or even assertive) cat, so he is just sitting on the bath patiently waiting to see what happens next. I go in from time to time and give him a pat. I ignore Smidgen as I suspect any affection will encourage him to have a go at Billy. As it is, all he does is demand I let him out. So Sebastian and I are relaxing in the loungeroom and the two of them are ignoring each other in adjoining rooms. Each room is equipped with food, water, litter trays etc so they see no reason to cross the threshhold of the intervening doorway. Sigh.