I made a mistake
When I was working on the quail pen I had popped into the garage and found a loose quail. I didn't even really look at it, I just assumed it was one of the males, because the top on their pen isn't super secure and sometimes they get out. So into the male pen it went.
I was just out there and noticed that my juvenile hen pen was wide open somehow, like the door opened on its own. Most of them stayed in - one was missing.
So I tossed a single hen into a pen of all males. Yeah, they tore her head open

I cleaned her up and put some Neosporin on her but it's a nasty wound and I feel terrible.