Now there's an idea! =)
I tried drawing a horse a couple of times, and I can tell you, compared to yours, it looked more like a spaceship than a horse.
Since I wanted pretty horse drawings on my walls, I took some acetate paper, drew over some nice pictures, and there they were, all pretty and horse looking, on my walls.
It's not easy, but it seems you have a nac for it, so keep going.
If you end up needing more pictures, I have a few, and I be happy to let you use them for pactice ;)
"There is something about the outside of a horse that is good for the inside of a man. ~ Winston Churchill"