Please help me diagnose and fix 2 of my girls 
The first 2 pictures are of my Oliver Egger’s tail-end. At first I thought she was just molting and her feathers would grow back. But they haven’t. She’s laying, eating and drinking fine, and acting normal, but is there anything I need to do to treat it?
The last 2 pictures are of my Black Copper Maran. She lost her eye over the winter but just recently I noticed the bare spots around her eye and head. I’m not sure if she’s getting picked on, scratching the area, or a combination of both. She’s also laying and eating/drinking/acting fine. Anything I can do to help her?

The first 2 pictures are of my Oliver Egger’s tail-end. At first I thought she was just molting and her feathers would grow back. But they haven’t. She’s laying, eating and drinking fine, and acting normal, but is there anything I need to do to treat it?
The last 2 pictures are of my Black Copper Maran. She lost her eye over the winter but just recently I noticed the bare spots around her eye and head. I’m not sure if she’s getting picked on, scratching the area, or a combination of both. She’s also laying and eating/drinking/acting fine. Anything I can do to help her?