The Arabs have a proverb that "there should be four points of a horse long, four short, and four broad. "The long are the neck, the forearm, the thigh, and the belly; the short are the back, the pastern, the tail, and the ear; the broad are the forehead, the chest, the croup, and the limbs. The head should be small and bony; that of an English thorough-bred of fifteen and three-quarter hands will measure twenty-two to twenty-four inches in length, with the forehead eight to ten inches broad, the face dishing below the eyes. The withers should be high, the shoulder as broad as possible—not fleshy, but bony—and lying at an angle of about forty-five degrees. The chest should be broad and deep, to give room for lungs and heart. The knees should be broad, the hoofs large, and not flat, but deep.
The reasons for some of the above recommendations may be made clearer by a rough comparison between the frame of the horse and that of man. For instance, the shoulder of the former, from the withers to its forward point at the joint, is equivalent to the shoulder-blade and collar-bone of the latter, and a broad shoulder is as sure an indication of strength in the one as in the other. If the horse is "short above and long below," it gives him a carriage similar to that of a man with a full, broad chest, who holds his head high and his shoulders back.
The knee of the horse corresponds to the human wrist, and his hock, or "back knee," as the children call