I have 7 20 week old girls, 4 RIR, 2PBR and 1 GLWyandotte. I also have 2 13 week Giant Blue Cochins, a 10 wk. Hamburg and a 9 week Cuckoo Maran. All are in same run area, 4 youngest separated, but can see. I will need to introduce them all together soon to insure cochins lay in nesting boxes and eat layer feed. I got the 4 littles comfy together so they could go into the 7 with more numbers, but the Hamburg is still so small. Hamburg (Gladys) flies like the wind and there are various places for her to flee, but I am worried about my bossy PBR initiating probs. She was confined for 3 days when I added the Wyandotte and she came out with a better attitude, but now she is laying. Have had eggs 3 weeks now, 5/6 of 7 are laying I believe. Suggestions or will I just have to wait and see. The Maran is much larger than the Hamburg, too. She is equal or nearly taken over the cochins and they are docile. When I leave them together for short times, the PBR (Maxine) incites alot of havoc. Hamburg owners have thoughts/ideas? She is a flighty little girl!