I've never seen anything like this. Something got into a tractor and killed one of my call ducks. There was a slice across the top of the breast 1" wide and from side to side. No blood. No meat chewed. We were out in the barn a couple of days ago. The was a feral cat, dead, wedged in among some paint cans, on a concrete floor. The head was cut half-way off. Once again, a gash 1" wide and no blood. No other damage to the body. All of my chooks , ducks and geese are in a metal house, on concrete, but I can't let them out in the tractors again until I find this thing. I have rat traps out, poison out, and LGDs in with the sheep. A couple of years ago, the hired hand told me he'd seen a pair of Fishers. I know there are mink around also. Could it be something like that?