Yeah, I also encourage you to consider edits, sometimes you may not be inclined to try a critique, but when someone else does it, it pops up at you and you're like, oh!, I see what he means! I understand your stance however, though I think it would serve you better to approach everything you post here from a "how much can I learn here?" attitude that would benefit you in everything else you do rather than a "how can I make this specific piece better?" attitude. In other words: I think it is in your best interest to consider anything that might be valuable for improving all of your work in the futere, rather than sacrificing potential new ideas or techniques merely to save the integrity of one piece.
Of course, like I said, I understand you stance, and if you still don't want edits, that should be respected.
As for the piece: I like this a lot. I think you should work on the shape of the tail and the long spiky teeth. Now they don't seem to curve and sharpen like they should, they are kind of blocky. Also, I think the further hooves could have one lighter shade. His rear right foot seems sloppily done. Perhaps a little of the highlight on the mid torso would bring out more volume.
