Mr Tiddles is a massive, much loved, extremely dozy, black cat. A year ago a young stray attached himself to us and moved himself in. At first all was fine. But as the stray settled and got more confident, he started to bother Mr Tiddles and Old Lady cat. Old Lady cat takes no shit so the stray (Little Shit) avoids her as much as he can. Unfortunately, despite being twice his size, Mr Tiddles is a wuss and is now absolutely terrified of Little Shit.
We've tried feliway but DS is allergic too it and got very poorly, very quickly. Then we tried having special hidey holes for Mr Tiddles where Little Shit couldn't ambush him. It seemed to work for a while but recently Mr Tiddles has been staying out for longer and longer periods and I'm really starting to worry that he's getting his paws under the table somewhere else.
He came back this morning after being gone for 8 days. So I've locked him in the attic. The attic is massive, with stairs up to a door. Like you see in American horror movies. Would it be cruel to keep him locked up there for a while with a litter tray and food and water, and plenty of visits? I want him to start to feel safe again. DH thinks he'll be fine and once he's settled we can put a chipped catflap on the door so he can come and go but Little Shit can't follow him.
Any other ideas on how to handle this? I don't want to rehome Little Shit if I can avoid it as DS is very attached to him.