shot with a wide lens. huge head teeny body. Horses are hard in this respect. way too easy to distort , a much longer focal length fixes this (like over 100mm) If you intend to distort them it's good to make it really obvious, humorously obvious. too much NI kills off the texture in his hair. nice color and good that you got his ears up.
A cleaner eye with a catchlight in it would up this score a bit. But, if this isn't your horse, I wouldn't have cleaned the eye either. Better safe than sorry.
Nice focus on the whole face, including the sharp eye. Well done.