The central placement of the ***'s works well , as they are all facing different directions. I like the lower angle, as you have them against the sky. Somehow, it feels as if this needs a slight CCW rotation.
Very sweet light and good placement of the horizon. Great head angle on some of them and eye contact too.
I think there is a magenta cast to the sky, you may want to select just the sky to fix it as not to alter the beautiful soft light in the rest of the picture.
The chaos of the horses facing different directions works well for the reasons mentioned - central placement and heads all visible. Agree with the magenta color cast in the sky comment. I would recommend a pano and cropping a lot of the sky though.