Foal Vs. Colt: The Key Differences and Why They Matter

Humans domesticated horses (Equus caballus) thousands of years ago for transportation and agricultural work. Over time, horses have evolved physical traits tailored to human needs through selective breeding, with over 400 recognized breeds. The equestrian world has its own vocabulary to describe horses, and equine terminology is understandably unfamiliar to non-equestrians. Two of the most frequently confused terms are foal and colt, which have almost the same meaning, but are significantly different. Continue reading to discover what determines whether a young horse is a colt or a foal.

What Is Equestrian Terminology and Why Does It Matter?

Equestrian terminology is the lingo that is used in various professions, such as veterinary medicine, farriery, breeding, training, and law enforcement (mounted police).

This precise language or jargon can describe horse health, behavior, movement, and equipment, from describing gaits (canter, trot) and anatomy (fetlock, withers) to training aids (bridle, bit). The lingo is used to help shorten and facilitate communication, and learning the difference between a foal and a colt is a relatively easy task.

Foal or Colt: The Decisive Factor

The definition of foal is a horse of either sex that is less than a year old. Both female and male baby horses are called foals until they are one year old. On their first birthday, female foals are called fillies, and male foals are called colts.

Although female and male foals are fundamentally similar, females are often quicker to stand and explore, while males can be slightly delayed in neonatal adaptation and may exhibit different exploration and anxiety patterns. Major distinctions, however, do not begin to emerge until after their first year.

A Colt Is Male

Colt is a term reserved for male horses from one year of age up to four years of age. Throughout a horse’s lifespan, there are different terms to refer to their stages in life, similar to the words boy and man, which are used to describe human males. 

The word colt is used to describe a young male of the equine family, Equidae. While most commonly associated with horses, it applies to several specific species within that family, including donkeys (Equus asinus), mules (E. asinus × E. caballus), zebras (E. quagga), and onagers (E. hemionus onager), also called the Asiatic wild ass.

A Foal is Younger Than a Colt

The primary difference between a foal and a colt is that the word foal refers to both male and female horses less than one year of age. Once a horse is over one year old, it is no longer referred to as a foal.

There is additional equestrian terminology to describe a foal. Horse foals are called sucklings while they are still nursing. This term is used to distinguish them from foals that have already been separated from their mothers, which are known as weanlings. 

Foals are typically weaned between four and six months of age, when they are eating solid food well and are less reliant on the mare’s milk. A mare is a fully mature female horse of breeding age.

What is a Gelding?

Colts are male horses between the ages of one and four years. In the United States, a colt is an intact male horse under four years old, while in the United Kingdom, the term colt usually refers to an intact male horse between two and four years old.

However, a male horse younger than four years old can be called a gelding. A gelding is a male horse that has been castrated, meaning its testicles have been surgically removed. Colts are typically gelded between six months and two years of age to make them easier to handle and to reduce stallion-like behaviors.

A male horse that has been gelded is called a gelding, regardless of age. A gelding under 4 years old is not a colt. Colt specifically refers to an intact male horse under four years old. Once castrated, the term gelding is preferred.