Those are really nice drawings!
I hope you don't mind me going into some talk on perspective concerning your horse drawing. I just wanted to say first off that you picked a VERY difficult pose to draw, and I commend you for taking on the challenge. However, as it is now his back end and his limbs are saying he's posed in one direction, while the torso neck and head say he's posed in another.
When drawing something at an angle like that, to make it look convincing we need to use something called foreshortening.
I didn't want to scribble all over your picture so I just did a quick drawing to explain what I'm talking about. Also note, the red shading is just to help show the muscle definition a little better, since it is important to keep in mind when trying to foreshorten something.
So if a horse is looking at us from this angle, we can see that the torso appears much shorter than it actually is. It's shoulder muscles also covers part of the neck as well. Yes it feels alkward to draw and it might even look wrong while your doing it, but in the end it will look more convincing.
This does take a lot of practice, but it will come more naturally the more you do it, I promise. 8D; And even though your already done with your drawing, maybe just try and sketch a few thumbnails with minimal detail (think of the horse more in terms of shapes, and no shading) of that same pose to try and practice foreshortening on a small-scale.
I hope I explained that in a way that was understandable.
Keep up the good work Crimson! I'm sure your teacher is going to be really impressed by your drawings.