MontyB
All-Blacks Supporter
Not having an artistic bone in my body, I hesitate to comment as to the proportion, however I do agree that the horse looks somewhat "light on" in the rear which my lead to the illusion that it is further away. There is also the matter of the rear hoof being higher indicating that it is further away.
I also think that regardless of the original, it might help if the front feet were pulled back a bit as it looks like he is propping (refusing to move forward) and at least part of another leg were visible as the present view gives me the distinct impression that the horse only has two legs. A mounted horse standing absolutely "dead square" is a fairly rare sight.
I like the picture but I agree that there is just something that does not seem right about the horse but I can not put my finger on what it is, I agree about seeing another leg I was thinking though that the back leg almost looks as though it is the "far side" leg.