Excellent composition here, I really like the negative (also called active) space you've left. By this I mean there's enough photo off to the left for me to follow the gaze of the moose and wonder what he/she is looking at. If anything, the moose could even be a little more to the right, giving just a bit more space on the left.

Sharpness looks very good, especially that all important eye.

The only thing I can see that really needs attention is the yellow cast which I think is caused by the white balance being off a little. If your editing tool has a colour balance feature then I'd bring in a bit of blue to counter that or if you shot in RAW format you may be able to correct it before most of the editing.

Good shot ... like the tongue