Remarkable shots! What a lucky guy to get to shoot a subject such as these big moose! Your shots are all nicely focused and sharp. I really love looking at these interesting poses you caught them doing. I personally like the first the best- I'm partial to the black and white- and the tones and light are beautiful. The only thing I see in these that bother me are the crooked horizons- not so much on the last one but on the first two. And on the second, I might have got a little more space behind the moose as it feels a little off kilt as it is.
Hope this helps