Nice photo. I really like the alertness and pose of the squirrel. I wonder whether a little more room on the left would open things up a bit. Overall very nice!
Had to stop and look, Dave. My first reactions: the light seems very harsh and bleaches the details in the subject fur and the stump. I do like the black and green contrast.
Overall a nice image, but it is a bit overexposed in certain areas. I think dealing with the bright areas on the stump and squirrel would really improve this image.