I, too , thought the horse looked a bit green. What I see is that she is not engaged. I mean, she is strung out, leaving her hind end hanging out behind her, not picking up her feet , but rather kind of shuffling along through the sand, and bracing her back. With a NSH it is always challenging because they do tend to be hot and want to be very bracing in the neck and back. She needs lots of warm up where you get her moving freely forward and work on encouraging her to reach down and foreward with her neck and reach well under herself with her hind.