I have folded few pegasus and unicorn before but seldom fold real horse. So, here was the result of a nice posing horse from a 510x510mm brown color paper. The final model is about one third of the paper size. The diagram can be found in the Origami Tanteidan Convention 14 and designed by Quentin Trollip. The only difficult part as the author said was the open sink to form the mane. Well, the whole model will look nicer if the other side of the paper has another color. Then the mane and the tail will look distinctly contrast to the body color.
Besides the mane, I like the forming of the eyes and the mouth on this horse. Both folds really bring out the real features of the horse.