Sorry, I have this thing about drawing horse heads, and they HAVE to be facing left! Haha
This is really a lovely sketch. I am amazed at how well that Aqua changed the orientation from right to left. How ? I have trouble doing that.
I really like how well you expressed the bone structure of the hors'es skull. The only thing that needs a bit more is to make the eye a bit more solid and "glassy" looking. Darker . The horse's pupil is slightly horizontal, but the iris is so dark that one cannot always see the pupil as seperate from the iris, at a distance, so it looks like one , large dark orb.