We have kept a bowl of cat food outside our back door for several years to provide food for the feral cats in the neighborhood. Lately we have been down to one cat. This siamese male cat has been around for several months. About 4 days ago the cat food has been going down faster than normal, so I figured we must have a two or three more cats in the area. The night before last, about 9 pm I looked out and saw a possum eating the food. When I turned on the light, he looked at me and then slowly wandered off.