All sounds great but look at your protein content of all you mentioned, not much there I'd say, so please try upping the protein like Amiga said using a couple tablespoons of dry cat or dog kibble if good quality . Most have a good level of protein and alot of times when we hear of feather pulling and eating that is the problem they are lacking protein. Then again she may just be a bully but what if you tried the cat/dog kibble and it worked so much less stressful than keeping her separated from her flock. I don't know what part of the country or world your in but right now not much protein being found where[natural foraging] I live too cold.They have scratch mix, scraps from the kitchen plus i usually give them a can of corn and a cucumber and zucchini(they go nuts over it) cut up. Lettuce if i have some to spare, tomatoes. Actually whatever salad stuff i have. They usually get a salad a day. Also the ends of the bread from inside too. I like to sit outside and handfeed them. They also get the forage in the horse paddock and house yard during the day when the dogs are inside.