The nose doesn't bother me too much, but would be nicer if sharp! But the crop is too much I think and as you say his whiskers are chopped off. Me being me, I'd also use Lightroom to increase the luminance of the red in his tongue a touch to lighten and brighten it and show the light coming through the edges. Don't laugh, it can add a bite to the image!

A good image. Maybe the clouds behind the tree are too dark and reduce the impact of the silhuette? It needs to pop out more I think.