hmmm, this would've worked better in macro I think. With the foreground wire in focus and the horse having more DOF. Also, you shoud've cropped out the 20mph sign :)
5 - Like the potential here. Wish the horse had more light/was not in the shadows. Straightening overall as well as a more refined crop, especially to eliminate the road sign on the right, make this better in my opinion.
I think it would have been a better shot to have straightened the horizon. With the horizon tilting one direction and the fence the other it gives me sence of vertigo.