I enjoy riding horses in my free time. Do you?
Horses in the Middle Ages differed in size, build and breed from the modern horse
That is true! My uncle raises horses, specializing in Pony of America horses which are bred to stay small, and American Quarterhorses the "typical American" horse
evolution of the horse, a mammal of the family Equidae, occurred over a geologic time scale of 50 million years, 
What are some horse breeds you are familiar with?
 Arab horse ( , DMG "ḥiṣān ʿarabī") is a breed of horse that originated on the Arabian Peninsula
the Clydesdale is also known as the gentle giant
Equestrianism
Equestrianism (from Latin , , , 'horseman', 'horse'), more often known as horse riding (British English) or horseback riding (American English), refers to the skill and sport of riding, driving, steeplechasing or vaulting with horses. This broad description includes the use of horses for practical working purposes, transportation, recreational activities, artistic or cultural exercises, and competitive sport.
Overview of equestrian activities.
Horses are trained and ridden for practical working purposes, such as in
registration is coat color; the pinto is not a true breed, but a color breed.
This registry is distinct from the American Paint Horse Association, which registers Paint horses. The Paint Horse is bred as a stock horse suitable for western riding, and comes from American Quarter Horse and Thoroughbred lineage. The Pinto Horse Association of America does not specialize solely in stock horse breeding, though some PtHA-registered horses are stock horses. Most horses with the recognized color pattern registered by the American Paint Horse Association qualify for