I have a Cornish X that escaped the slaughter truck. She is about 3 1/2 to 4 months old. She has been beaten up by my first flock so badly we had to build her a seperate but connected roost and inner coop. When we let the flock out to free range, she goes too. She recently was mated on by one of our RIR roosters, and now she does this little thing , like a dance, when I come into her roost where she gets down low to the ground, spreads out her wings and sort of "wiggles". I think she is just wanting to mate more. Also, her butt has no feathers on it. I don't know if she is pulling them out, or if she just doesnt' have any there. Any idea?