It started with my duck. They plucked out tail feathers. I got her separated and bandaged up...now more than half of my chicks(older ones) are outside. The younger ad bantams are still in the brooder. Went down this morning and overnight someone plucked at my BO chick and her tail is bleedimg. Got her fixed up, but can't figure out WHY they're doing it! I don't think its space as there's less chicks now...are they bored, what to do??