The details: -I have 3 Red-Star hens, about 1 year old. -I am introducing 2 Araucana and 1 Silkie pullets, about 4 months old. -The coop is 4 x 6, plenty of roosting area, 5 nesting boxes--2 of which I have partially blocked to allow the new gals a place to hide out. -The run is decent sized, a place for them to hide. -There is food and water in both the run and in the coop.\\ -We are in New York The History: Initially, at the recommendation of the breeder, I put them in the coop at night and monitored carefully the next morning. CARNAGE. The older birds went after the new gals pretty quickly and viciously. I let it go on for the day, but they just wouldn't let up and my kids were hysterical. After reading every single post on this forum regarding the subject, I separated your birds into another smaller coop alongside the main for a week or so, so that they could all see and get used to each other. Reintroducing them again last night the older gals have them penned into a corner this morning and still periodically attack. No bloodshed so far but the harassment is pretty constant. It's really, really cold here. The secondary coop is quite lightweight, drafty, and pretty small. It's also a pain managing two separate coops. I'm also getting the feeling that if I keep going back and forth I'm just going to make things worse. I'm inclined to just let them sort it out and hope for the best. Any suggestions?