Had similar with 4 chickens couple years ago. The lead hen changed between the three often but the odd girl out remained the same and unfed. Old farmer told me to pick up the lead hen and hold her. Make a point of showing everyone who is the real lead. As per further instruction, picked up every hen a few minutes a day. They calmed down.
Feeding the outlying hen privately is not a bad idea either. Did that a few times. Even gave her special treats - fish, beef liver, scraps,........
They seemed to work on fear, not jealousy. For my own sake I talked to them as I held them. Told them what I thought of them and how and why. And what I required of them. Who knows what they got from it. Made me feel better. That hen is still the outlier. At least she grew her comb back and eats.
Feeding the outlying hen privately is not a bad idea either. Did that a few times. Even gave her special treats - fish, beef liver, scraps,........
They seemed to work on fear, not jealousy. For my own sake I talked to them as I held them. Told them what I thought of them and how and why. And what I required of them. Who knows what they got from it. Made me feel better. That hen is still the outlier. At least she grew her comb back and eats.