My one dominant hen, Amanda, is pecking at another hen, Debbie, CONSTANTLY! Debbie used to peck at Amanda though! Debbie has become submissive, just crouches down whenever she is attacking. If Amanda chases her, she runs to me! So I have now been stoping the fights, but they still happen. They have plenty of coop space and are let out Daily. I read somewhere to use vinegar or salt. A little help please!?!?!??!