I seem to have a dysfunctional flock. My four older hens have battled over roosting spots for over a year. My coop was designed for eight hens. It is a garden coop if anyone is familiar with that design. There is only room for one roosting bar. My oldest hen (8) has taken to sleeping in a nest box as has the lowest on the pecking order. If she tries to roost the other two 2 year olds shove her off. Of the two remaining hens, one either sleeps at the top of the ramp or down in the bedding. Only one hen roosts. I have battled this out with them night after night, and usually given up exhausted. Now I have four new eighteen week olds that I am integrating into the flock. So far no bloodshed during the day but the older hens won’t let the younger ones even into the roosting area. They peck at their legs until they retreat down the ramp. One hen guards the opening and won’t let them in. I am at my wits end! Technically there should be enough space for them all to roost together. I do not have an option to enlarge the area or add another roost. Does anyone have a suggestion as to how to solve this problem? The roost bar is 5 ft. 4 inches long. The width of the coop not including nest boxes is 3 ft.