My RIR's are 7 weeks old, and have been in their own pen outside with a light since 3 weeks old. They are too cute! When I give the White leghorns next to them a treat, they run up and down the fence, anticipating theirs. I have a stool in their run, and when I sit down, whether I have treats or not, they jump on me , look me in the eyes, get on my head, and act very sweet. I love it!