You might update the other thread you made for this problem. You could link this post if you'd like more input on possible solutions.Mystery solved, now…what to do about it?
Well it looks like the cause of my “naked butt” girls is from one of them “feather plucking/pecking”, and pretty sure the culprit is Scarlett.
I observed it happen several times this morning. It shouldn’t be dirt related, since they are on a food that is 18% protein. And it doesn’t appear overtly aggressive (although there is definitely some mild aggression to it). It is more like she sees a fluffy butt on a girl with her head down and can’t resist going over and grabbing a few of those fluffy little feathers. So now, what I do to stop it? Especially with my limited mobility right now?!