Horses that have a white coat color are often mislabeled; a horse that looks "white" is usually a middle-aged or older gray.
Grays are born a darker shade, get lighter as they age, but usually keep black skin underneath their white hair coat (with the exception of pink skin under white markings).
They may have calmer temperaments than horses and also a high level of intelligence that may or may not be used to cooperate with human handlers.
Additional genes control suppression of black color to point coloration that results in a bay, spotting patterns such as pinto or leopard, dilution genes such as palomino or dun, as well as graying, and all the other factors that create the many possible coat colors found in horses.
The height is expressed as the number of full hands, followed by a point, then the number of additional inches, and ending with the abbreviation "h" or "hh" (for "hands high").Female horses, called mares, carry their young for approximately 11 months, and a young horse, called a foal, can stand and run shortly following birth.Most domesticated horses begin training under saddle or in harness between the ages of two and four.Thus, a horse described as "15.2 h" is 15 hands plus 2 inches, for a total of 62 inches (157.5 cm) in height.The size of horses varies by breed, but also is influenced by nutrition.Humans provide domesticated horses with food, water and shelter, as well as attention from specialists such as veterinarians and farriers.