The greyhound is a breed of hunting dog that has been primarily bred for coursing game and racing, but with a recent resurgence of popularity increasingly as a pedigree show dog and family pet. It is a gentle and intelligent breed that often becomes attached to its owners. A combination of long, powerful legs, deep chest, flexible spine and slim build allow it to reach average race speed speeds of in excess of 18 meters per second (59 feet per second) or 65 kilometres per hour (40 mph).