Quote from SlIpKNoT_MaGGoT

Turns out it was a rabid pack of Vampire Wolfs. Iv'e seen this before.. its not pretty. They sucked him dry. (no homo) But what do you expect from em', eh? See, with Vampire Wolfs, they can fly, because their part Bat. One must have over fed and let one paw slip to the snow. No problem for them though. They just flew off after they had their feast.

****.. strike all of that. I know who did it.. the VEGANS! D:<

Quote from Kaas

All the print I can see are either circular (walking sticks right?) or deer prints. So it must have be carnivores deer, no doubt about it.

Quote from Ash

It died and birds got to it, man. Look at the hair everywhere, and the way the deer was eaten in little areas. Birds pick meat off areas that have already been picked off of.

Or it could have been weak or sickly and got attacked by birds. That explains the hoof prints.

Quote from Wtf

He was attacked elsewhere.
He walked almost unconscious.
He died.

You might have some blood trails around no?
If you don't probably the snow covered it.

And maybe some animal just passing by ticked on it.

Quote from Kaas

What animal walks away from his slaughter scene far enough for it not to be obvious in sight (I'm guessing the finders aren't blind and such) while having a gash the size of the empire state in his side and missing half of his head?

I find the birds most likely. Either that or carnivores deer.