A couple of days ago, when I went to the coop to shut them in, about a half hour after sundown, I saw a possom in the coop. The chickens were quietly sitting on their roost, the possom was still on the floor, and I have not seen any harm done to them, so I was lucky to get there in time. My Mommy warned me I could lock something in the coop with them if I wasn't careful when I locked them up at night. She was certainly right. So I suggest you look inside pretty closely before you lock that pop door. Please note my chickens were quietly sitting on their roosts with the possom on the floor. Don't count on your chickens to give you any warning. I could not get a good back swing with the shovel in the coop but I was able to shovel him out into the run. He went limp and played possom when first struck. He did get up and try to get away once I got him in the run, but they are fairly slow and I could get a good backswing out there. So I guess another warning. Don't be fooled by them playing possom.