Jensownzoo
Songster
I kicked my standards out when they were 3 weeks old. They had a lot of feathering, but I also provided a lectro-kennel heating pad suspended on a wooden frame for them to crawl under when they got cold. It got below freezing last night and they did fine (now approx 4 weeks old). Some people brood putside from day 1 using a similar method.