We recently adopted our friends EE mixed group of hens. We have 7 layers and they are about 1yr 1/2 old. They lived in a small chicken tractor - about 15' long by 12' wide and 2' tall with a small coop attached - but we expanded and opened up their daily space. We easily get 5/6 eggs a day and they are a mix of colors from olive, blue, brown and a troublesome light brown. We have one chicken (unknown which) that lays eggs that are consistently strangely shaped, really thin, and breaks upon opening. Even the whites don't hold form. We feed them what the original owners did- Scratch and Peck organic layers corn free mix. We have oyster shells out for them, and they get free range into our yard almost daily eating grass/weeds and bugs (untreated/no chemical grass) Each one of them has spot specific bald spots where I believe the other hens are picking on them. Doesn't look like molting- so I've temporarily ruled that out as the cause. 1- what is causing one hen to lay thin eggs that break and spread upon opening? 2- how can we get them to stop picking each other's feathers out? Thanks!