Nice photos! My favorite is the last one, horses are so beautiful.
The 2nd one slightly distracts me since the fence is in the way of the horse. The 3rd one is also distracting since the metal pole is what is focused on in the left half of the picture. But, thats just my opinion since I very new to photography still.
This is a very personal matter of taste, but I feel that horses need to have ears in photos. It is only me, I know, but for me cropped off ears in horse pics ruin the photo. The third is a very interesting point of view (POV), and the all blue sky as background really helps - but a vertical photo would have done this perspective more justice (is what I think).
Same in the fourth: a close-up on a horses eyes and eye-lashes is a very common motif, and for me it should then be either only the eye (going a bit more abstract than here) or half the head WITH the ears.
And I very, very sorely miss both ears and hooves in the last. That one, so I feel, is too tightly cropped on the whole.
I appreciate your two cents! I didn't crop any of them. The last I agree I wish his ears and hooves were in but I couldn't back up fast enough and focus on him lol
Those are all great things for me to keep in mind next time I photograph him!