Horse

Overview

The horse (Equus ferus caballus) is a domesticated, one-toed, hoofed mammal that belongs to the family Equidae. Humans began domesticating horses around 4000 BCE in Central Asia, and by 3000 BCE their domestication was widespread. Today there are more than 300 breeds of horse in the world, developed for many different purposes.

Horses vary greatly in size depending on breed and nutrition. Light riding horses typically stand 14 to 16 hands high and weigh 380 to 550 kg, while heavy draft horses can reach 18 hands and weigh up to 1,000 kg. Height is measured at the withers - the point where the neck meets the back - and is expressed in hands, where one hand equals 4 inches.

Ponies are taxonomically the same animal as horses, but are generally considered to be those standing under 14.2 hands at maturity. Ponies often have thicker manes and coats, shorter legs, and wider bodies than horses, and may also have calmer temperaments.

Temperament & behaviour

Horses are adapted to run and have a strong fight-or-flight response, which is rooted in their natural instinct to escape predators. They have a good sense of balance and are naturally alert animals, so sudden movements or unfamiliar situations can startle them.

Horse breeds are broadly grouped into three temperament categories. Hot bloods are spirited horses bred for speed and endurance. Cold bloods, such as draft horses and some ponies, are calmer and suited to slow, heavy work. Warmbloods are crosses between the two, often bred for specific riding disciplines.

One fascinating behaviour linked to their predator-escape instincts is that horses can sleep both standing up and lying down. Younger horses tend to sleep significantly more than adults. Mares carry their foals for around 11 months, and newborn foals are able to stand and run very shortly after birth.

Care basics

Most domesticated horses begin training under a saddle or in a harness between the ages of two and four, reaching full adult development by around five years old. Although the skeleton continues to develop until around six, so care should be taken not to overwork young horses.

Foals are generally weaned from their mothers between four and six months of age. Horses four years old and older are considered mature, with mares (females) and stallions or geldings (males) each having their own specific care needs depending on their role and lifestyle.

Horses have an average lifespan of 25 to 30 years, though some individuals live into their 40s and beyond. The oldest verified horse on record, Old Billy, lived to the remarkable age of 62. Good management, environment, and breed all play a role in how long a horse lives.

Health awareness

Horses have a strong fight-or-flight response, which means stress and environmental changes can affect their wellbeing. It is worth being aware of any changes in behaviour, appetite, or energy levels, as these can sometimes signal that something is not quite right.

Mares have an estrous cycle roughly every 19 to 22 days from early spring into autumn, and most enter a resting period during winter. Owners of mares should be aware of how this natural cycle can affect mood and behaviour throughout the year.

Twins in horses are rare, and pregnancies last around 340 days on average. Keeping an eye on a pregnant mare and being aware of the expected foaling window can help owners be prepared and seek appropriate support in good time.

Horses' skeletons continue developing until around age six, so general awareness of how workload and exercise may affect younger animals is worthwhile. Regular check-ups with a vet and farrier are an important part of keeping any horse healthy.

This is general awareness only, not veterinary advice. Always consult a vet about your pet's health.

Fun facts

The horse evolved over 45 to 55 million years from a small, multi-toed creature called Eohippus into the large, single-toed animal we know today - originally in North America.

The largest horse in recorded history was a Shire horse named Mammoth, born in 1848, who stood an incredible 21.2 hands high and weighed an estimated 1,524 kg. At the other end of the scale, the smallest horse ever recorded was Thumbelina, a miniature horse who stood just 43 cm tall and weighed 26 kg.

Horses have 64 chromosomes, and their genome - sequenced in 2007 - contains 2.7 billion DNA base pairs, making it larger than a dog's genome but smaller than a human's.

Horses come in a huge range of coat colours, and at least 13 different gene variants influencing coat colour have been identified so far. Interestingly, there are no true albino horses - a horse that appears white is usually a grey whose coat has lightened with age.

Source

Adapted from Wikipedia (CC BY-SA 4.0): https://en.wikipedia.org/wiki/Horse