I live in a neighborhood with few chicken predators save your typical neighborhood cats & dogs and the occassional groundhog (my biggest concern, or so I thought). There's a preserved area down the street near a canal, so we have a group of deer in the area and once I saw a wild turkey cross our front yard. Let me stress that we are not in a rural area- in fact I can see the capital buildings of Trenton New Jersey from my second floor windows. We havent had any predator issues in the entire year we've had our 7 hens. We've been so trusting and naive that we have been leaving our coop door open the entire (!!!) summer, fall and winter so far without any incidents. No one had been home for 24 hours due to work travel. When my husband went to check the hens, he found this. The opposum had been "vacationing?" in our coop for at least 24 hours, because the fresh snow revealed no tracks. He was sleeping in the only available egg laying box (I had closed the other two because my hens arent laying many eggs right now.) He was sound asleep when my husband opened the egg box door. Imagine the shock! Smart opposum, right? Staying warm in the coop, eating eggs and possibly feed. I am amazed that my hens survived it completely unharmed, but they did. Cant say the same for the 'possum. YES, we have changed our tactics and are vigilant about locking the coop before sunset (the hens go in about 4:30). Just thought I'd share my unbelievable story- God was protecting our girls that day.