Funny I was surprised to see both, I didn't think the black one was, and I had to do a double take at the picture I posted. In person her comb doesn't look red at all, so it is strange that in this picture it does look red (I'm calling them her until proven otherwise

) I definitely agree that the other one is a cockerel. I'm going to keep hoping the black one is a girl, but am now paying much closer attention to her comb. Crazy, it just doesn't look red in person.
As far as the predator attack, it is a red fox, saw it in person today in my backyard, it was coming back for more! My flock won't be happy not free ranging, but I'm not risking anymore loss right now.