A couple times in the last week we were not able to lock up our coop. On both occasions something has gotten in my coop and killed one of my birds. The first night it killed one of my ducks, and left a good portion of the carcass in the coop. Last night it killed one of my Plymouth rocks, there was nothing left of it but blood and feathers. I believe it could be about anything, I have raccoons, opossums, foxes, coyotes, mountain lions, black bears, bobcats, farrel dogs and hawks to deal with in my area. The thing is is whatever it is now knows it has an easy meal. I need to trap it but I don't know what it is an therefore have no idea what size trap to use. Is there any cheap and easy way to find out what it is?