However, maybe you could try a closer crop... It seems slightly awkward having so much empty space on the right when your wife is cut off. And to be nit-picky, I would clone out that dark spot on Royal's face (below his eye)
Wow. What a beautiful moment you captured here. This took my breath away. Working daily with horses, having a connection, a bond like that with them, it's unlike anything else, literally. Nothing else at all. You caught such a precious moment here it really stirred my heart. I do wish your wife wasn't out of the picture as much. But I would leave the dark spot; I think this picture deserves some imperfection. The lighting, the subjects' pose, everything is gorgeous. Excellent work, best shot I've seen in the short time I've been at TPF.