Hi David,
Flowing mane, raised legs, and a mesa in the BG, doesn't get much better than this. Beautiful animal as well. I might try to brighten up the shadow a bit to lessen its impact. I'd be curious to see what this looks like with more mesa and sky but I like animal/landscape type images. Nice image.
Steve
You couldn't have defined a more becoming pose for this beautiful animal.
The dark spot in the lower-left leads the viewer to wonder what's around, as the image contents imply wide open spaces. That creates a bit of visual tension that IMO falls short of distraction, so it is good.