Not a bad shot, we call these animals Caribou over here. The image is a little underexposed because your snow has a faint bluish tinge to it. You might want to adjust the white balance in post-processing. Alternatively, if you haven't tried it, an exposure compensation of somewhere between +1 to +2 may help give you whiter snow in camera - you might have to experiment a bit to find the necessary compensation.
WesternGuy