Color me confused; why on earth did you post asking for a critique?
If can't do anything other than exactly what you're doing because of 1) your instructor 2) the horse's owner 3) knee pain, what is it you expect to gain from poster's responses here?
If you just want "Atta girls!" I suggest posting in the photo section.
You've been given correct and accurate commentary in this thread. Either one of the posters or I could expound on it or give more detailed explanation, but your responses have very effectivly shut off further discussion.
Good luck to you.
I suggest you read the stickied threads at the top of the forum re: asking for a critique before posting in her again.