
4 weeks, have never managed to delay it beyond 4 1/2 weeks no matter how bad the weather, but these are very forward breed and like the outdoors.
Have had five week old puppies romping in the snow, not wanting to come in.
I have a 12 x 10 foot dog run outside the kitchen with double kennel attached, so they can have one of the kennels too, so pups have room to play, and a board across the entrance keeps and area free of puppies for the adults, but they can come and go to pups.
Indoors they are confined to the puppy pen so the adults again have peace, and are only allowed loose for a few minutes under supervision, could not have them running loose all the time indoors, it's hard enough not to stand on one as it is ;) .
Luckily no larger wildlife brave enough to enter my garden, though cats tease through or from the fences.