A few weeks ago I got a trio of chinese quail. I had to remove the youngest bird when I found her one morning with blood all over her, and I assumed it was an issue with them being in a trio, so she's been separated for almost a couple of weeks. Today, I checked on them and found that the older silver girl, same age as the roo, was also covered in blood on her head, and also had an injury to her cheek. She's now in with the younger girl and the boy is on his own. I'm assuming that it's him, since there's nothing in their cage that could cause these injuries to the girls. They have enough space, so I don't think that's an issue, they have enough food and constant access to water, and yes, both of the others are definitely both hens. The older girl and roo were hatched and raised together, although the younger silver hen wasn't, as she's 3 weeks behind them. Why would he be doing this, does anyone know? Should I be thinking of culling him and replacing him? If so, how would anyone recommend humanely culling a quail? I'm quite happy looking to replace him - going to an auction on monday so may pick up some birds there, but if it's an obvious issue that could be fixed then I'd prefer that. Thanks a lot!