Okay, So i've been stalling on this and Note; Its my opinion and its not the super-mega-i-am-right-you-are-wrong opinion of doom, but you asked for help^^
Yes, I had to doodle on it, thats how i roll.
http://oi46.tinypic.com/2rwbaip.jpg
Hope it helps and remember, you don't have to change it
THE HOOVES: I know that how she is turning her body/head/neck/cupcake can make her feet go that way but it makes it look incorrect. Pigeon-toed, actually. Though horses can have pigeon-hooves, hers don't match the rear. that was the biggest thing i noticed other than the head.
PS: ♥pretty rump♥
PPS: I hope you do well!