I too like the soft light and the pose as well as your inclusion of the long shadow. You might consider cropping from the bottom and adding more room at the top. I'm OK with the "darkness" of the image, as presented, but brighter might make an interesting alternative.
Love the eyes and the almost perfect head angle. Another vote for lopping a good bit off the bottom.
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So that's where all our Snowy's went to :)
Interesting composition, including the whole shadow seems the right way to go.
I like the crop as is but would like to see everything a bit lighter overall.