I have a 24 week old hen(buff orpington) that keeps hiding in corners and puffs up when approached. I noticed this behavior yesterday and started watching and checking her over. No sign of mites or anything but she seems thin. When I picked her up yesterday her crop was full but today it was not. I picked her up and moved her away from the others with separate food and she ate no issue. After putting her back i noticed she went to hide as soon as my 17 week old rooster(Ameraucana) approached and he followed her and wouldn't leave her alone. Is she afraid of him? What are my next steps if that is the case. I have 15 chickens 2 of which are roosters she doesn't seem to mind the other much larger rooster (light brahma) but none of the other hens seem bothered by the smaller rooster.