and, this response is a little late it seems, but depending on the weather, it it perfectly acceptable to move them outside at that age. As long as they have a secure, predator proof place, away from older hens that they can stay, they will be fine.
Lordy lol I often misspell words when typing. I'm not the best typer and I don't proof read before hitting submit! It doesn't help that often I have a cat in my lap supporting my iPad and a dog on one side trying to sniff the cat and they are both jiggling the iPad.