Cute Young Blonde Girl Posing With A Horse

- Gelding: a castrated male horse of any age.
In horse racing, these definitions may differ: For example, in the British Isles, Thoroughbred horse racing defines colts and fillies as less than five years old. However, Australian Thoroughbred racing defines colts and fillies as less than four years old.
• Size and measurement
The height of horses is measured at the highest point of the withers, where the neck meets the back. This point was chosen because it is a stable point of the anatomy, unlike the head or neck, which move up and down.