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The Horses Portal

Horse and foal

The horse (Equus ferus caballus) is a domesticated, one-toed, hoofed mammal. It belongs to the taxonomic family Equidae and is one of two extant subspecies of Equus ferus. The horse has evolved over the past 45 to 55 million years from a small multi-toed creature, close to Eohippus, into the large, single-toed animal of today. Humans began domesticating horses around 4000 BCE, and their domestication is believed to have been widespread by 3000 BCE. Horses in the subspecies caballus are domesticated, although some domesticated populations live in the wild as feral horses. These feral populations are not true wild horses, which are horses that never have been domesticated and historically linked to the megafauna category of species. There is an extensive, specialized vocabulary used to describe equine-related concepts, covering everything from anatomy to life stages, size, colors, markings, breeds, locomotion, and behavior.

Horses are adapted to run, allowing them to quickly escape predators, and possess a good sense of balance and a strong fight-or-flight response. Related to this need to flee from predators in the wild is an unusual trait: horses are able to sleep both standing up and lying down, with younger horses tending to sleep significantly more than adults. Female horses, called mares, carry their young for approximately 11 months and a young horse, called a foal, can stand and run shortly following birth. Most domesticated horses begin training under a saddle or in a harness between the ages of two and four. They reach full adult development by age five, and have an average lifespan of between 25 and 30 years.

Horse breeds are loosely divided into three categories based on general temperament: spirited "hot bloods" with speed and endurance; "cold bloods", such as draft horses and some ponies, suitable for slow, heavy work; and "warmbloods", developed from crosses between hot bloods and cold bloods, often focusing on creating breeds for specific riding purposes, particularly in Europe. There are more than 300 breeds of horse in the world today, developed for many different uses. (Full article...)

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Skeletal anatomy of a horse

The limbs of the horse are structures made of dozens of bones, joints, muscles, tendons, and ligaments that support the weight of the equine body. They include two apparatuses: the suspensory apparatus, which carries much of the weight, prevents overextension of the joint and absorbs shock, and the stay apparatus, which locks major joints in the limbs, allowing horses to remain standing while relaxed or asleep. The limbs play a major part in the movement of the horse, with the legs performing the functions of absorbing impact, bearing weight, and providing thrust. In general, the majority of the weight is borne by the front legs, while the rear legs provide propulsion. The hooves are also important structures, providing support, traction and shock absorption, and containing structures that provide blood flow through the lower leg. As the horse developed as a cursorial animal, with a primary defense mechanism of running over hard ground, its legs evolved to the long, sturdy, light-weight, one-toed form seen today.

Good conformation in the limbs leads to improved movement and decreased likelihood of injuries. Large differences in bone structure and size can be found in horses used for different activities, but correct conformation remains relatively similar across the spectrum. Structural defects, as well as other problems such as injuries and infections, can cause lameness, or movement at an abnormal gait. Injuries to and problems with horse legs can be relatively minor, such as stocking up, which causes swelling without lameness, or quite serious. Even leg injuries that are not immediately fatal may still be life-threatening to horses, as their bodies are adapted to bear weight on all four legs and serious problems can result if this is not possible. (Full article...)

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Credit: User:Fir0002

A Thoroughbred race in Tambo Valley in Australia. Horse racing is an equestrian sport that has been practiced over the centuries; the chariot races of Roman times are an early example. The common sobriquet for Thoroughbred horse racing is "The Sport of Kings".

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Dølahorse eating grass

The Dole Gudbrandsdal, Dølahest, or Dole is a draft- and harness-type horse from Norway. The Dole Trotter is alternately considered a subtype of the Dole Gudbrandsdal and a separate breed; it is also considered a part of the coldblood trotter type. The Dole Gudbrandsdal is a small draft horse, known for its pulling power and agility, while the Dole Trotter is a smaller, faster horse used for harness racing. The two types were previously commonly interbred, but the studbooks have been separate since 2000 and since 2016 the criteria for entry into the Gudbrandsdal horse studbook has required a strict critique of eligible mares. The Dole is originally from the Gudbrandsdal Valley, and is probably descended in part from the Friesian horse. Over time, the breed has had Thoroughbred, Arabian, and other breeds added in, especially during the creation of the Dole Trotter in the 19th century. The first studbook was created in 1941, and the current breed association was formed in 1947. Although originally used mainly as a pack horse, today, the heavier Dole type is used mainly for agricultural purposes. The Dole Gudbrandsdal been crossed with other breeds to develop horses for harness racing and riding. (Full article...)

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