Greyhound
Greyhounds were bred for their speed and they are often used for racing as they can run 40 miles per hour. While they are fast dogs, they make excellent pets, surprisingly, as they are very gentle and loving thus making them perfect not only for families with younger kids but also senior people. If not running around, they love to laze around the house and are known to be cuddly couch potatoes. They also have a calm comportment and they are never known to bite their human owners out of aggression.
