What do you call a foal that is between six months and one year old?

The term used to refer to a foal that is between six months and one year old is "yearling." A yearling is specifically classified as a young horse that has completed its first year of life. This terminology is important in the context of horse evaluation, breeding, and showing, as it helps in identifying the development stage of a horse.

The designation of "weanling" applies to a foal that has recently been weaned from its mother, typically before six months of age. The terms "colt" and "filly" refer to the gender of the horse: a colt is a young male horse that is typically under four years old, while a filly is a young female horse of the same age range. Understanding these terms aids in clear communication about horses at different stages of their growth and development.