Girl With A Horse

The distinction between a horse and pony is not simply a difference in height, but other aspects of phenotype or appearance, such as conformation and temperament. Ponies often exhibit thicker manes, tails, and overall coat. They also have proportionally shorter legs, wider barrels, heavier bone, shorter and thicker necks, and short heads with broad foreheads. They may have calmer temperaments than horses and also a high level of equine intelligence that may or may not be used to cooperate with human handlers. In fact, small size, by itself, is sometimes not a factor at all. While the Shetland pony stands on average 10 hands (40 inches, 102 cm), the Falabella and other miniature horses, which can be no taller than 30 inches (76 cm), the size of a medium-sized dog, are classified by their respective registries as very small horses rather than as ponies.
• Colors and markings
Horses exhibit a diverse array of coat colors and distinctive markings, described with a specialized vocabulary. Often, a horse is classified first by its coat color, before breed or sex. Horses of the same color may be distinguished from one another by white markings, which, along with various spotting patterns, are inherited separately from coat color.
Many genes that create horse coat colors have been identified, although research continues to further identify factors that result in specific traits. One of the first genetic relationships to be understood was that between recessive "red" (chestnut) and dominant "black" allele that is controlled by the Melanocortin 1 receptor, also known as the "extension gene" or "red factor." Additional genes control suppression of base red and black color to point coloration seen in bay, spotting patterns such as pinto or leopard, dilutions such as palomino or dun, as well as graying, and all the other factors that create the dozens of possible coat colors found in horses. These colors can be modified by at least ten other genes to create all other colors.