I have a bullying problem with one of my jap quail set ups! It has 1 cock and 4 hens at 8 weeks old. I have only had these ones for about 3 days. The cock has a favourite hen who he chases no end while she runs and flushes to escape him. Now 2 of the other hens have stared pecking at her too. Sometimes she seems stressed and exhausted (panting). I tried her in my next set up. The cock there seemed a bit better although chasing her but another hen was pecking her so she is back in the original set up in the covered area up the back. I have put food and water in there for her but she is in the dark. Please advise, what I should do to solve the problem. The quail are in large set ups with plenty space. There is lots of fresh food and water, sand for bathing, veg. I can't think what else to do. Please help!