Males are usually 71 to 76 centimetres (28 to 30 in) tall at the withers and weigh around 27 to 40 kilograms (60 to 88 lb). Females tend to be smaller with shoulder heights ranging from 68 to 71 centimetres (27 to 28 in) and weights from less than 27 to 34 kilograms (60 to 75 lb). Greyhounds have very short hair, which is easy to maintain. There are approximately thirty recognized color forms, of which variations of white, brindle, fawn, black, red and blue (gray) can appear uniquely or in combination.
Although greyhounds are extremely fast and athletic, and despite their reputation as racing dogs, they are not high-energy dogs. They are sprinters, and although they love running, they do not require extensive exercise. Most are quiet, gentle animals. An adult greyhound will stay healthy and happy with a daily walk of as little as 20 to 30 minutes. Greyhounds have been referred to as "Forty-five mile per hour couch potatoes."
Greyhound owners and adoption groups generally consider greyhounds to be wonderful pets. They are pack-oriented dogs, which means that they will quickly adopt humans into their pack as alpha. They can get along well with children, dogs and other family pets. Rescued racing greyhounds occasionally develop separation anxiety when re-housed or when their new owners have to leave them alone for a period of time (the addition of a second greyhound often solves this problem).
Greyhounds bark very little, which helps in suburban environments, and are usually as friendly to strangers as they are with their own family. The most common misconception concerning greyhounds is that they are hyperactive. In retired racing greyhounds it is usually the opposite. Young greyhounds that have never been taught how to utilize the energy they are bred with, can be hyperactive and destructive if not given an outlet, and require more experienced handlers. Rescued Greyhounds, however, have been taught to chase after small, furry things, and may be confused or need guidance on how to deal with small animals such as kittens, rabbits, and other small furry objects.
Greyhound adoption groups generally require owners to keep their greyhounds on-leash at all times, except in fully enclosed areas. This is due to their prey-drive, their speed, and the assertion that greyhounds have no road sense. Due to their strength, adoption groups recommend that fences be between 4 and 6 feet, to prevent them being able to jump.
Greyhounds do shed but do not have undercoats and therefore are less likely to trigger people's dog allergies (they are sometimes incorrectly referred to as "hypoallergenic"). The lack of an undercoat, coupled with a general lack of body fat, also makes greyhounds more susceptible to extreme temperatures, and most sources recommend that greyhounds be housed inside.
Greyhounds are very sensitive to insecticides. Many vets do not recommend the use of flea collars or flea spray on greyhounds unless it is a pyrethrin-based product. Products like Advantage, Frontline, Lufenuron, and Amitraz are safe for use on greyhounds and are very effective in controlling fleas and ticks.
It is often believed that greyhounds need a large living space, however, they can thrive in small spaces. Due to their temperament, greyhounds can make better "apartment dogs" than some of the smaller hyperactive breeds.
Health:
Greyhounds are typically a healthy and long-lived breed, and hereditary illness is rare. Some greyhounds have been known to develop esophageal achalasia, bloat (gastric torsion), and osteosarcoma. Because the greyhound's lean physique makes it ill-suited to sleeping on hard surfaces, owners of companion greyhounds generally provide soft bedding; without bedding, greyhounds are prone to develop painful skin sores. The typical greyhound lifespan is 10 to 13 years.
Due to the unique physiology and anatomy of greyhounds, a veterinarian who understands the issues relevant to the breed is generally needed when the dogs need treatment, particularly when anaesthesia is required. Greyhounds cannot metabolize barbiturate-based anesthesia as other breeds can because they have lower amounts of oxidative enzymes in their livers. Greyhounds demonstrate unusual blood chemistry, which can be misread by veterinarians not familiar with the breed; this can result in an incorrect diagnosis.
Greyhounds have higher levels of red blood cells than other breeds. Since red blood cells carry oxygen to the muscles, this higher level allows the hound to move larger quantities of oxygen faster from the lungs to the muscles. Greyhounds have lower levels of platelets than other breeds. Veterinary blood services often use greyhounds as universal blood donors.
