I love horses! This and the rodeo pics that have been posted have been a real treat. I love how our pic shows the musculature of the front of the horse. What a difference from the rodeo horses --different sport, different body types needed. All are trememendous athletes. You even captured the shadows to show his nostrils flaring to intake as much air as possible --nice!
I like it. Does the rider have a copy of this?
The fence in the background is a minor distraction for me, have you tried doing anything with it?