I know this is late advise, but I move a broody to a separet pen as soon as I am sure she is serious. I built a pen in the barn for just this purpose. I do all this over a week or so, when there are chicks at the farm store> Then I slip chicks under her in the dark, with a tiny head lamp on me, wait, hoping, (oh, yes remove wooden eggs or real eggs at this time.) So far, have been doing this for 10 years with great success. My best broody was a banty cochin, who died at 9 years old. Good luck, maybe next time,move your broody to her own pen. just a thought. Oh yes, I do not move them with the other hens until they are fully feathered, mom will watch for them.