I have 6 hens and 1 started pecking her feathers out on a small area of her neck on Friday/Saturday. I know it is her and not bullying because we have cameras in our run and I have verified. On Sunday she laid a soft shell egg. She skipped Monday and laid another soft shell egg this morning. She is 14 months. My first thought was mites/lice. We checked thoroughly in the coop, on her and the 5 other hens are all fine. All our hens dust bathe regularly. This hen is acting normal, eating, jumping up and down, going out, etc. One thing, while it is the same brand, I did just switch their scratch feed right before this back to without corn. We gave them the same scratch with corn for the cold months. Nothing else has changed.