I just introduced 8 week old girls to 16 week girls, 3 to 3 ratio. I know I should expect some pecking, and it's hard to watch and not intervene. When is too much just too much, before any blood shed? They've been together but separated since Sunday and I put them together at dark in the coop last night. There is a old dog crate for the new girls to go to but I have the door open and the older girls can go in now as well. I appreciate any advice you can give me.