A colt, gelding, or filly are known as what up to 1 year of age?

A colt, gelding, or filly up to 1 year of age is known as a foal. The term "foal" specifically refers to a horse of either sex that is less than one year old. This encompasses all young horses that have not yet reached the stage of weaning, which typically occurs around 6 months of age, but the foal classification continues until the horse turns a year old.

Other terms like "yearling" refer to young horses that are between one and two years old, while "weanling" is a term used for horses that have been weaned from their mothers but are still under one year of age. "Stud," on the other hand, refers to a male horse that is used for breeding. Understanding these classifications is essential for animal science, particularly in managing and breeding horses.