Help! I have 3 rir pullets who are pulling the feathers out of my number one hen, an OEGB. Number one does not appear sick, or injured to me in any way. Why would they turn on her? She is now the last one to eat too. Recently, with in a few weeks, her sister died. Is she lonely and now "depressed"? I sprayed her with better bitters to try to keep them from pulling all of her tail feathers out(it says its for birds- can you poison a bird with these type of products)? I know periodically they will try to rearrange the pecking order, but to gang up on her? Does any one have any ideas?