Just a small update: I am not ashamed to admit that I am addicted to an online horse role-playing game called Equine-Ranch. Incorporating true-to-life scenarios and genetics, one is able to breed and show horses of any of breed, while steering clear of such obstacles as an unnamed genetic disorder, diseases such as Equine Infectious Anemia, and high inbreeding coefficients. Far more advanced than any other horse SIM, I highly recommend this game to anyone who has ever been interested in genetics and/or dreamed of having their own horse breeding outfit.
That being said, I created this picture for a fellow E-R player in exchange for a custom horse in the game. It's pen and watercolor on w/c paper, with chalk pastel highlights: