Last night one of my two ducks got attacked and killed. The attacker skinned about half the duck, but ate very little. Few feather were spread around. The other duck's eye was injured. Does anyone know what might have done this? I've never locked the ducks or chickens up at night(until now) and the ducks usually sleep outside. The predator had free access to the pen through a open gate. Above is the bad eye of the duck that survived. Above is underside of the duck eye of the killed duck.