I don't want to worry you, I'm sure you are doing that anyway, but how will you know if he takes them off to a shelter? He's used these cats as exterminators for the past 14 years, at very low cost to himself. Now they are pretty much at the end of their useful years and starting to become a nuisance in that people are asking questions about their care. I can't see someone like this paying for vaccinations if they are not "paying for their keep".

You did the right thing, no question about that, but this bloke seems clinical and cold about his cats' care. I'm beginning to hope he ends up in a retirement home where they won't cut his hair or clip his toenails.