A neighbour's cat (I don't know which neighbour for sure) spends a lot of time outside even in these freezing temperatures. I'm a bit worried about it as it's only a small thing but it is long haired if that makes a difference? When I come home from work it runs up to me shouting and is ever so friendly, purring its little head off. It was out in minus 3 this afternoon. Last week it was sat outside all day in the pouring rain 
Is this ok? Not ok? If not ok, what would you do?