At first glance, I wasn't sure what you saw in the image. With cord in front and the sign to the right of the stall, it appears to be a document photo of a museum exhibit.
Of course, that's perhaps the point of the image - this great breed of horse being reduced to a museum exhibit for tourists to gawk at. The life of the horse doesn't exist beyond the museum-like life it leads. Sad, really and the photograph portrays this. Well seen (I think, but I'm not sure that was your original intention with this photo).