Help. Not really sure how but something is getting into my pretty secure chicken run for the last two nights and completely eating ONE chicken each night. To the bone. No other chicken is hurt or even seems flustered. We've had racoons before but they destroy many birds and don't seem to be as thorough eaters of the carcass. Preceding these incidents we lost two birds (one a night) when each of them had their heads mangled. We have a neighbor with a family of opossum living under his shed so I figured that was from them reaching through the hurricane fence. Maybe it's the opossum getting in someplace? So we did a big reinforcement of the run, it's totally enclosed with netting over the top and no place more than 6" unsecured, 1/2" wire running around most of it, hurricane fence along the back (another neighbors yard). We went all around the run and can't find any entry points, footprints or anything. Someone suggested rats, but I can't believe they would eat the carcass so completely and how would they kill the 8lb. meat bird in the first place? Have no idea what else it could be, other than the opossum, and if so, how do I keep them out? Not sure what to do at this point. Just really frustrated and sad. Thanks for reading!