Is this blue P. sleeping on the ground with others? Maybe trying to sleep UNDER them? That could cause the fraying of those feather ends. Have you checked her for mites and lice? If she has none, I'd put her on some Calf Manna. It will improve feather quality.
I'm going out every night at dark to make sure that my 8 EBOs, who are now 9+- weeks old, are up on their 6" tall roosts.I'm determined that they WILL learn to roost up off the floor . 5 of them have finally got it, but the other 3 who are a few weeks, younger haven't. They would sleep in a pile. Their dad, Monty, still waits for me to put him up on the higher roost with the dominant pullets.Lifting him up every night saves me health spa fees.Great for the arms, bad for the back. The big clown!