1st pic, is quite distracting, what is intended to be the interesting feature of the photo?
The 2nd is quite balanced, though the shadows are a bit dark and you're almost losing the fisherman on the left.
3rd pic, I'm guessing the horse is intended to be the interesting feature, is there any reason you've included the crow? if not next time wait till it's out of the shot to avoid taking the eye away from the horse
The 4th I quite like, if possible try to include a bit more around the horse.
The 5th if you want to do a portrait, unless there is a natural frame (window, horse box etc) try to include the whole head.