I have two cages of quail. One has 7 females and 3 males, the other has 7 females and 2 males (had three, but one escaped and likely fed the hawks that nest behind our house). In one pen, I have a couple birds missing feathers on their heads (the worst off is a male). I haven't figured out which one is the problem bird, so I haven't culled it yet. In the other cage, I didn't seem to have much of an aggression issue (no balding birds). Today however, my daughter went out and saw a bloody bird in the second pen. Not just a little blood either. It looked like its neck was almost ripped out. The poor thing bled all over the back side of the cage. My wife put in in a cage all by itself until I got home. It was alive, but not looking good. The skin on its neck was opened up, and it had clearly lost a lot of blood already. I put it out of its misery. Anyone see anything like this before? The pen has 1/2" hardware cloth all around, and I haven't seen any sign of predators. I don't think a predator did it, but I also can't imagine one of the other quail doing it either.