I have an old flock of 4 hens just over a year old. 2 days ago I added 5 younger smaller birds a few weeks away from laying. I know for a few days they are going to fight, when they are a distance from each other they are OK but if one of the smaller ones strays too close to the big girls there is carnage. I have a big garden so there is space for them to stay away from each other when they are free ranging but is this helping? Should they be closer to each other in the run so they can work out their differences?