One of my chickens is missing most of her tail feathers, she is 22 weeks old. She lives with 5 - 23 weeks old girls and 4 two year olds. She is at the lower end of the pecking order. my flock is of several breeds so it's easy for them to tell who's who. I let them out into thier yard every am. I give them treats from the garden, scratch, and sometime boss to scratch around for. they also have layer crumbles free choice. I let them free range most evenings while Iwork in the yard, hawks are migrating though lately. I tried making a clothe cover she hated it. I tried vaseline, they ate it, so I sprinkeled it with cayenne pepper, they don't seem to notice. They haven't broken the skin yet, but how do I stop this bad behavior before they really hurt her?