LIke it! BUT-- since u said critique.. icouldn't help but notice how he looks angry. maybe soften his exppession a little. Don't get me wrong, its really great, better than my attemps at horses.
It's really nice, but the nostril seems to small, and from the angle of the head, you wouldn't be able to see that much of the other one. Also, the eye's just a tad too slanted down and long, it should be slightly rounder. But otherwise it's great.