This isn't a question about large fowl heritage breeds, but I'm going to ask it here anyway since I've noticed the people on this thread tend to have a lot more experience. That and I have noticed that some of the other conversations here don't revolve around heritage breeds, too. =)
We have 2 Norwegian Jaerhons that are 100% completely feathered out - heads and all. They're also quite large. It's not that cold here...it's 48 celcius right now, with no wind. Their coop is here and it's 100% sealed IE: no drafts at all.
Are they seriously too young to be placed in their coop on their own? They haven't had any sort of heat lamp or heat at all in the house for 2 weeks now and have done just fine without it. They're kept in a 60 degree room with no issues (in our house) with a fan on low setting (wanted to get them acclimated to the cold sooner).
They were hatched on October 26th and it is now November 25th so they are a little over 4 weeks old...I know..young still. But, they are fully feathered (even their heads). I had one of them outside tonight for about 2 hours in the cold (holding him) while we were looking at the coop and speaking with the builder...and he (the chicken) seemed perfectly fine out there in the cold...didn't seem to bother him a bit, he just sort of slumped down and fell asleep in my hands actually.
So...do I really have to wait another 4 weeks (when they're 8 weeks) to put them outside with all that feathering on them? If so...I will.