I'm having trouble integrating a couple of my younger hens. They are almost full grown and have been laying for a while now but I still can't put them with the rest of the flock without them being attacked. I thought I had done everything right so far. When I first introduced the chicks to the flock, I built them their own area so that they could still see each other without being able to get to each other. All this time later and still if I put them together all my other hens gang up on the young ones. I've had to take them straight back out every time. Any advice on this would be fantastic. Would love to have them integrated soon so I can use the smaller area for some new chicks I just bought.