We got some chicks a while ago. They were 2 & 4 weeks when we got them. We had them in a brooder in my husbands shop for 4 weeks. Then we moved the brooder, which is half chicken wire, to inside the run of our established flock. That way they could see the big girls, and the big girls could see them, without anyone getting to eachother. Well it has been almost 3 weeks like that, so they are about 9 & 11 weeks old. Is it too soon to try to let them free with my other girls?