I have 5 BO's and 3 BA's that chase and peck my white leghorn roo. The roo is 1 month younger than the rest and not near the size. I have the roo in a separate cage in the coop on the floor. He has been there for about 1 month. I though by now they would better acquainted. The larger chickens don't seem to be bothered by him till they get close. As soon as they approach the little guy freaks and starts running and that is when the pecking starts. What should I do? He is a beautiful bird and I hate to loose him.