They manage. I've never heard of a farm cat freezing to death if they have a building to go into with enclosed spaces to sleep (although I'm sure it must happen occasionally). Raccoons know how to stay warm without human help and I guess wild cats do too.
I saw the big feral tom standing in 6 inches of snow in the yard eating chicken bones in -10 weather last night. He looked fine, despite being cold and not supposed to eat chicken bones :/ (I don't know what to do about it because if I put them out he'll eat them but if I put them in the trash he'll get into the trash can, still eat them and make a mess too, can't really win). I don't have any outside cats but I still keep a couple of straw-filled totes in the machine shed so he probably uses those.
I saw the big feral tom standing in 6 inches of snow in the yard eating chicken bones in -10 weather last night. He looked fine, despite being cold and not supposed to eat chicken bones :/ (I don't know what to do about it because if I put them out he'll eat them but if I put them in the trash he'll get into the trash can, still eat them and make a mess too, can't really win). I don't have any outside cats but I still keep a couple of straw-filled totes in the machine shed so he probably uses those.