To be clear he isn't forced to sleep outside but he doesn't always come back when he's called.
Last night for example, I spent the whole evening going and checking if he was at the back door. I didn't go to bed till 11pm because he wasn't there.
I heard my son checking at 1am.
Then at 7am, in minus 7 temp, he was at the back door.
I was thinking about those warm boxes people make for cats, so that if he does end up locked out when everyone's asleep he at least has somewhere warm to go?
Have no idea where to start though.