Do you have any rodents in the coop? Move and rats will eat feathers for protein. Keep an eye out if you get rodents it can become a severe problem quickly and they can even turn predatory.
Do you keep feed out all the time? What are you feeding them?
My other guess would be feather picking/pulling or clumsy dominance display by your little cockeral.
Do you keep feed out all the time? What are you feeding them?
My other guess would be feather picking/pulling or clumsy dominance display by your little cockeral.