It looks fine to me, but I seldom draw, and I certainly know little about shading. I suppose if I had ever taken an art class that wasn't the catch-all mandatory course I might have learned something more substantial than how to draw an empty soda can and paint using only shades of a single color.
A chewed-off ear, a prominent facial wart, dark rings under the eyes, different-sized feet turned in the wrong directions... what is the inspiration for this unfortunate-looking character?