I had 4 chickens (2 months old ... predicted roo and 3 pullets) but a pullet was killed by my dog so I bought 2 other pullets from the same batch that the roo was from. I put them all together and the roo chases after the two new pullets and grabs their feathers like hes trying to pull them out. He has never acted like that before. So temporarily I locked him in a dog carrier. Anyone have any ideas on what I should do here?