I just got 3 6 month-old chickens and added them to my almost year-old flock of 4. They are all the same breed (Red Sex Link). It's only been a few hours but they've been fighting. All of the old chickens chase around and peck the new ones. I try to scatter feed around the run so that they still have access to food. I don't think they will allow them on the roosts at night (I have two 4 foot perches in the hen house). Should I separate them or just let them have at it until they establish the Pecking Order? Is it all right if they don't sleep on the roosts for a few nights? Thanks for any help!