I agree Lisa…. and sort of offended by that statement also. Has nothing to do with keeping them warm... Obviously if they are in the house and in a warm room, what does that have to do with keeping them warm? And we do have mild temps here, but most mornings in the winter it is below freezing, so keep them warm is something we all are aware needs to be done, remembering that a pup first born has no reflex to shiver... hence the reason to keep the room warm. While we in California might be able to get them outdoors earlier due to the weather (which I do)... I don't believe in not exposing pups to the world and at an early age. I can tell you from experience that my very first Basenjis were sheltered when they came home here to Tanza... and did they get every darned illness that came down the pike?... that answer is YES... when I had my first litter... at 7 wks my keeper was at a lure trial... and had visitors before their eyes opened... did they grow up with less illness... you bet they did.
So while it is up to each breeder on how they raise puppies... both Lisa and I are expressing our experiences that for us it is not necessay to "lock" them away... regardless of that part of the country they are born in... as Lisa said it is a personal choice... we had chosen that at the earlier the better.
And just to add to that... I remember years ago when Vickie of Rugosa was still breeding... her pups were out in the weather.... cold, snow, rain ... whatever at 5 to 6 wks....