I have two 2.5 month old hens that were raised together and are bonded. I have 3 one month old hens that I am trying to introduce. The older birds are significantly bigger and stronger. I let them all roam around the backyard together and one of the older hens is pretty ruthless with the young ones. I haven't allowed it to get to the point of drawing blood...but the babies are afraid of her and avoid her. The other hen leaves the babies alone for the most part, but she sometimes joins in pecking them as well. The older ones are outdoors and the little ones are indoors at night still. Does separating them at night cause them to fight? I thought introducing them when they were younger would be better. Should I wait until the babies get older and better at defending themselves?? Am I dooming them to never get along??? Please help!