Wow, GrammaChar, that is a huge possum. I have chickens but I also have Multiple dogs that keep most of the wildlife from coming close to the house.
I've seen possums "Playing Possum" after the dogs back them in a corner. The problem with them is that they are very dirty creatures. It was years ago now but I will never forget the time a homicide detective friend came to visit and a possum showed up. He told how when they find anything dead in the woods, it's common to find a possum eating from the rear end of the body.