About a month ago I combined two pairs of hens into a small 4-chicken flock. They could see each other through wire some time before and there wasn't much aggression when they were united. They are 2 smallish Baladi hens and 2 Leghorn hybrids. The Leghorns immediately took command, being No. 1 and 2 of the flock. Next in the pecking order came the younger one of the Baladi hens. She gets along fine with the Leghorns. But the older Baladi hen was and is terrified of the Leghorns. She stays away from them and keeps to the corners of the coop and run. At feeding time, the other 3 cluster around the food and she stays far away, making sad little noises. I have never seen the Leghorns attack her viciously, just sometimes ordinary pecks. But she's totally afraid of them. Last year, she was my top hen in a different flock. She lost a clutch of chicks to predators and since then already she seemed subdued and lost her confidence. What should I do about the situation?