I am a new owner of my backyard flock and I'm still learning about chicken behaviors. I have 4 young hens and a roster. The rooster and the dominate hen pluck the feathers off of the meekest hen and eat them. they also eat any fluffy feathers that come off the other hens. Is this a sign of a diet deficiency or of dominance? And if is it dominance issues, what can I do to stop them the meekest hen already has a little bald spot right above her tail feathers.