I have a small flock, one roster, and five hens, one of them raising a little chick. My hens all lived in peace but recently two of them started sharing the same nest, I tried separating but both would be together the following day. It was all as fine until the hens began fighting, and it got to a point where both were bleeding. I separated one of them for a day and night and when I let her join the rest in less than 30 seconds they were fighting again aggressively.

Now the other one is isolated and I don't really know what to do, they all have plenty of space, food, and water, and their not fighting the other hens nor event trying to attack the little chick.

Does anyone have advice on this? I really don't know what to do.