i love this concept. and the execution is marvelouse.though the nose and flesh on the snout seem akward and out of place for some reason. how does this creature keep warm without fur on it's fleshier parts?
Great concept and great rendering on the beastie. You might add a bit more detail to the feet, fur and snow, which come off as a bit flat. Maybe a very faint bluish sidelight coming into the shadows? That might also serve to make the environment feel colder.
Anyway, take my critique with a grain of salt: I wish I had some of your skills!