i think a possum was the culprit. we have some silkies we hatched out, about 7 weeks old, and 2 of them turned out to be polish silkie mixes, the cutest little weird ugly birds you ever saw. one had cross beak and died, and 1 was doing great! this morning we went out to the coop, and it seems 2 chicks were pulled out in peices through the fence, and i think it was a possum, they do that. and it was 1 black silkie, and the remaining orange mixed bird, uugghhhh, why did it have to be that one. my kids are sad.