What kind of predator--wild or domestic--would take only the head and neck of a chicken, leaving the rest of the chicken undamaged? I have lost too many chickens now to this menace. I have closed up all holes and set traps around chicken house, but have NOT seen this predator -- 'possum, fox, raccoon, cat, ect. It's puzzling because it's killing my best chickens, but only taking the head and neck. Anybody have any ideas about what it could be?