All I've ever raised was silkies and they're prone to vitamin deficiencies and ailments like wry neck, etc., so anytime they lose an extra feather I'm thinking they need extra vitamins lol. Sometimes it can help by giving them a little boost. Not saying it will here but you just never know and worth a shot.Thanks! Yes, spats were usual but quickly resolved lol this is something else entirely. She’s been separate for almost 3 days and 2 nights and I’m going to reintroduce her tomorrow. We shall see how it goes. It’s interesting because she doesn’t seem to want to move up in the pecking order eg, doesn’t try to get in the coop ahead of anyone at night or eat first etc. it’s a mystery but maybe vitamins, might be worth a try, even though they get a good chicken feed.