Troll-free zone | 1500px max for photos | Play nice!
I really like this B&W image, the overall composition and lighting work very well.
The only suggestion I can make is to apply a subtle localized dodging (lighting the image) on the horse's neck especially the top part so the hair shows a little more detail (in my screen it all goes black there and I think it would improve the image if you had a little more detail in the hair).
Hi Andrew, maybe you're right. But my retina display shows me fine, subtle details in the horse's hair. So, to you as photographer: Did you try to calibrate your display yet? That doesn't cost a fortune anymore - and helps very much finetuning the edits of your own images.