Well, having gone through more vetting than Haringey social services would apply to a child adoption, I have been allowed to make a home for two moggies from the shelter - mother and son.
They were living wild but aren't feral. Mum's cautious but Boy has all his instincts in the right place, launching himself at the window glass when a pigeon passed by. And he has very sharp teeth and a very strong jaw. They settled in straight away and not a single 'accident' anywhere, and have voracious appetites. Once they're allowed out of the workroom I expect chaos. Oh well.