Girls are 3 weeks old and pretty much feather out. Glad I fixed a large brooder they are flying enough I have to be careful while cleaning up. Hope to finish up 4x8 chicken Tractor next week I'm think I need to get them out of brooder but it can get a little cool still at night I guess I can move heat lamp with them. How big of a run do I need I only aim to keep 8 -10 hens will 2x4 welded wire work for a day time only run Thanks for the help