Wonderful detail on the muscle and bone structure. The only suggestion I can make is that the hooves don't look like they're really on the ground. Unless you were going for that effect. :)
White Horse (blue) by @morna (Jessica Evans)
K, this isa different version, still no done, just playing around with the background. Added a lil' more detail.
I absolutely love your art morna! Its fabulous, just like this, the horse is so beautiful, I love the way you made it seem so real, and the blueness background, excellent job!