Ugh, my Cochin, Ivy, who is the head hen, is picking the tail feathers out of some of my other hens! Naughty brat! My poor RIR, Rose, who is the bottom hen, only has a few tail feathers left. Of course Ivy's little bum is beautiful and full, while she leaves everyone else looking like crap...my Wyandottes, who use to have gorgeous bums, now look horrible. When I got the girls, I got one group of chicks earlier than the other. I've noticed, though she rules the roost over them all, that Ivy doesn't mess with the tail feathers of the later group, only the group she was ordered with. She's not picking at the other hens to the point of blood (though I'm afraid she may start), but she has picked the feathers out of their bums so much that Rose especially, has had spots where she was bare. The feathers are growing back in, but I worry about her in this cold weather (though I know some chickens have been known to molt in cold weather). What can I do? Any advice will be much appreciated!