Difference Between Warm Blood, Cold Blood and Hot Blood Horses
The three general categories of horses are warm blood, cold blood and hot blood. Each of the hundreds of different horse breeds fits into one of these categories.
The cold blood breeds originated in Europe. They were bred for heavy work and long hours, pulling farm equipment, carts, barges and other heavy items. They had to have both power and endurance but there was little need for speed. Consequently, they were bred to have well developed muscles, on heavy bones and large joints. They also need to have a calm, even docile nature, so that they would obey commands and would not frighten and run off with farm equipment or other loads. In response to the need to work in cold European winters, their tails, manes and coats had long, thick hair. The Shire horse and the Clydesdale are typical cold blood breeds.
The hot bloods are from warmer climates, in particular the middle-east, where they were bred for racing and riding. They have much lighter bodies, legs and joints than the cold bloods, as they are build for speed and distance rather than for raw power. Having been developed in warm regions, they have relatively short coats, manes and tail hair so that they can shed heat better. For the same reason, they have lots of blood vessels near the surface of the skin, to improve heat dissipation. All of these factors support their speed and racing success. Likewise, they are spirited horses with a desire to run, the very opposite of the calm and docile temperament of cold bloods. The Arabian and the Thoroughbred are classic hot blood breeds.
The warmbloods (or warm bloods) have characteristics between the cold bloods and hot bloods, both physically and temperamentally. Some, but not all, of the warmblood breeds were created by crossing hot blood breeds and cold blood breeds to produce a new breed, followed by selective breeding to retain the best characteristics of the warm and cold ancestry. They have an athletic build and speed, combined with intelligence and calm (but not docile) disposition. As such, they excel in sports such as show jumping which require not only physical speed but also intelligence, a settled disposition and trainability. Examples are the Friesian and Hanoverian breeds.
The categories cold, warm and hot has nothing to do with the temperature of the horses (all horses have a normal temperature of about 38C) or their blood. Instead, it refers to the origin of the breeds (cold or hot climates), their build (heavy or athletic) and their character (calm or spirited).
All breeds are bred for certain characteristics, but the desired objectives tend to change over time, with the result that the breeding direction changes as well. As an example, the Oldenburg warmblood was bred in the late 1800s to be an elegant carriage horse, in the early 1900s the direction changed to be a farm and artillery horse, and in modern years to be a sport horse. Consequently, the breeds have changed over time not only due to the success of breeding programs but also due to the changing direction of breeding programs. More generally, as the historical functions of horses have been taken over by machines (e.g. farm work by tractors, transport by cars), the breeding objectives have been more towards sports and pleasure riding. This change in the objectives and use of individual breeds has resulted in a parallel gradual evolution of the three categories of warm, cold and hot bloods.
Duber Stewart is the author of Warmblood and Cold Blood Horses and many other articles at his Horses For Sale site about horses and their care.
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