Classic Morgan neck! Beautifully captured, my friend. Simply wonderful. This is so crisp and so sharp...It's just fantastic.
Now, from a critique standpoint...well, not much to say really. I disagree about the background. I don't find it distracting at all. It actually adds a bit to the feel of a farm, if you ask me. The one thing I might consider, and it's just a little thing, is the red brow band on your halter. I'd rather see a horse this beautiful in either a full leather halter with very little adornment, or in a full-on show halter with lots of metal. This one...well, it's not simple enough to avoid being a bit distracting and it's not fancy enough to add to the overall image.
That's about the only critique I could offer. It's a simply wonderful picture of a great looking horse. Very, very well done!