This is my first year with chickens. My hens look as if they might be molting. But since I'm not sure what this looks like, I need some help. Most of them have lost a spot of feathers on their back, and it seems that new growth is coming in. However, I have a buff Orp who lost all of her butt feathers and none on her back. Is this normal? Also all of them have been laying. I have six hens and have been getting 4-6 eggs a day. So I just want to make sure that all is normal here.