I rather like your shots. I had to do a horse portrait once and they scare the hell out of me. That's why I chase birds, not too intimidating
1 - Some might say the front feet are clipped?
2 - Some might not like the shallow DOF, but I do and like the sunset (sunrise) reflection.
3 - Really sets a somber tone. I didn't think horses laid down to often.
4 - I didn't think horses had horns