We have two one year old banty hens. We just got two new pullets--one is 3 months, one is 4 weeks. They've been hanging out together. All was fine until this evening when one of our banty hens started attacking the 3 month old pullet. She's acting like a roo, although I know she's not. What should I do? Should I separate the evil attack hen or let them work it out? Thanks!