okay... so, I just went and looked up wolverine on Google and was reading up on them, and it mentions them killing moose, and so I felt I had to add this...
last year pieces of a dead moose got dragged all over our yard, it was like some weird nightmare, I went out and there was a giant leg laying there in the garden! OMG! it freaked me out. Every day a new piece showed up, for about a week. Also more than once, in the past 5 or 6 years dead deer have turned up in the swamp. The local police told us that they were likely to have been killed by bear or coyote (both run rampant in the area, and we've got at least one mother bear with cubs in the forest behind our house, though she/they have never bothered us...the bear have been living out there at least for the last 15 years, back when I saw them the first time; and there's a pack of about 12 or 15 coyotes that wander through every few months, though they have never bothered us either, they just pass through) , but after what I just read about wolverines, and what happened with the moose last year, what's happening now with my hens, I'm thinking it's very likely this thing is a wolverine.
The police keep saying wolverines are not native to the area, but twice recently they know of them being sighted, so wither they are native or not, somehow a couple of them got here and are known to be not far away.