So, I have just gotten a new flock of six four month old pullets. The problem is that they enjoy eating feathers. Eating feathers that are laying around in their yard isn't so bad; but that's not the feathers that they are after. They will walk up and pluck feathers off each others' backs and butts. It's a constant thing, also. On some hens it's so bad that they look like a rooster's favorite, but there is no rooster. I'm guessing that they are doing this because they are lacking on some nutrient? Is there something that can be done to stop them from doing this? If it is a nutrient, what nutrient will help stop this?