I bought a roo and two hens who were housed in the same pen and they get along famously. But last week I bought home two new hens and 'Mr. Bill' is terrorizing them. So far I've tried.... First day I let the roo and two hens out of the pen to free roam and let the new girls have 3 or 4 hours to get acquainted with the new pen, where the water and feed is as well as the nesting boxes. When I let the others back in the roo practically attacked the new girls - the Buff Orpington in particular. They flew up to the nesting boxes and stayed there all the rest of that afternoon and all night. The next morning I pushed them down from the nest and he attacked them again so I pinned him in a wire dog kennel (in the coop) so they could get down and get acquainted. Put him water and food in there. That afternoon I let him out again. Same thing.... he attacked.... the new girls flew up to the nest again and stayed there all night. I have let Mr. Bill out of the pen and forced the new girls down from the nest two days in a row now. They seem willing to be part of the flock as long as it's just the girls. They are still laying and letting the other girls into the nesting boxes so they can lay too. But the drama is thick as butter. What did I do wrong.... what can I do to help resolve this.... or can it be resolved without bloodshed? Will the roo have to go? The coop is a 10x10 dog kennel with a sun screen netting over the top. The pen itself is enclosed on three sides by a tin building. I think there is enough room for everybody. There are 7 nesting boxes. (only 6 were completed in the picture) The two new girls: Help!