I had a possum in my coop the other night,he did not live to see another day. Luckily no physical harm was done to my hens, but some were very upset. All though the following evening some of the hens were reluctant to go back to the coop, they did get over it though. We are surrounded by lots of woods so I'm sure one of his cousins will visit in the future, so I have added more security.