I just picked up 4 new jumbo coturnix hens 2 days ago. They are 7 weeks old and were raised together. They are still in the quarantine pen for now. I have noticed a couple have some rough looking feathers. And one has been losing the feathers on the back of her neck. Looks like over breeding but there isn't a male with them. I've sat and watched and haven't seen any one picking on each other. These birds are inside so I can see and hear them all the time. I haven't witnessed any fights or excessive preening. Could the feather loss just be stress from the move? Or aftermath of an incident prior to arrival? Though they seem calm and all laid eggs yesterday.