They have a coop 8'x8' with roosts along the walls, and a fenced run 20'x8'. There are 8 birds. I feed them a non-GMO pellet and grain mixed layer feed.
We have 8 chickens: 4 Barred Rocks, 2 Australorps, and 2 Sapphire Gems. All 4 Barred Rocks have some signs of something wrong with their back feathers, toward the base of their tails. The attached photos are the worst case with one of them. The other breeds have no signs of this at all. All...