...is that the legs are all wrong for a start; they bend in all the wrong places. I've always had a problem with horses and it's because I just can't get used to their legs. The actor who played the back end of Dobbin (the pantomime horse) in BBC's Rentaghost actually refused to have his legs surgically removed and put on backwards to make the horse look more realistic. Consequently the introduction of that character marked the beginning of the end for the series. I also have issues with horses teeth which seem to be unnecessarily big.
Anyway, a few years ago I did this pen and ink pic of a stagecoach being pulled by some horses. The horses were hard, the people were easy.