I'm going to have to agree with some of the people here, that the shot it's self leaves a little too much to the imagination. But If I was going to do something with it, I wouldn't crop anymore. I think color does very little for the mostly monochrome horse. So I turned it to black and white (60% red, 40% green channel). I used the unsharp mask and smart sharpening to bring out a little more texture. I also tweaked levels a bit to give the eye more detail.