They say you learn something every day. My local hardware guy ( he's my predator expert) told me mink or weasels were the ones that just ate the blood.
If your wire is large enough for a coon to get its fingers through, they can kill poultry. I don't understand why the birds wouldn't stay away from the sides, but they don't seem to. I'm not as nice as Citychicken, when I screwed up and put young birds in a pen that wasn't coon proof, I was really mad, both at the coon and at myself. But I fixed the problem, which was the pen, not the coon. A lot of people seem to have good luck using electric fence around their coops & runs, but I free range during the day and my geese are always free. I'm afraid I would kill one of them.