SerrarGett
Songster
I don't think it could've been a skunk. When they do kill chickens, it's usually on the defensive. I don't see any evidence of a fight, so it is likely that the predator was targeting the birds. I'm very sorry for your loss, OP.In my experience owls and hawks pluck out a lot of feathers and start eating at the neck and breast area.
I don't know what would just chew on the thigh like that, maybe a skunk or opossum? I'm not familiar with those kind of kills. Hopefully someone else more experienced will be along to help you with that.