I love these type of threads.
As a former race horse groom in HS in South Carolina (they wintered there and it started out as a weekend gig) who grew up with horses, I went both ways until I settled on the second leg from the right.
The rear leg "hock" is clearly visible and means the horse is coming towards the camera.
I, of course, reserve the right to be completely wrong
Z's explanation is also sponge worthy...that and she is holding the lead line with both hands.