I have 3 older hens in a semi large coop. They are around 3 yrs old. I have 2 hens I started as chicks. They are now fairly big at 3 months old. I've been trying for weeks to get them together. Two of the older hens attack the youngins. they corner them in the inside coop and keep pecking at them. the two young ones do not stick up for themselves at all. I've tried putting them in at night when all is quiet. I've kept them in a small pen inside the large pen so the older hens can see them and be with them but not touch them. Yesterday the two young ones fly over their pen and got attacked again. How can I get the two older hens to stop? I really need them to be all together before the cold weather comes.