hi there! My 19 week Orpington is growing a ton of feathers. The quills look so painfully thick, goodness. My question is these little black flecks are coming off the feathers, what part of feather development is this called? He’s so dander-ey too. I thought the flecks were dirt but now I can see them embedded on the new feathers. Just curious as I never noticed this on my buffs or barred rocks.