The Galgo Español (Spanish galgo) or Spanish Greyhound is an ancient breed of dog, specifically a member of the sighthound family. The English greyhound is possibly a descendant of the Spanish greyhound and, for several years in the 20th century, some breeders did cross-breed Galgos and Greyhounds in order to produce faster and more powerful Galgos, specifically for track racing purposes. Galgos are similar in appearance to Greyhounds, but are distinctly different in their conformation. Galgos are higher in the rear than in the front, and have flatter muscling than a Greyhound, which is characteristic of endurance runners. They also tend to be smaller, lighter in build, have longer tails and have a very long, streamlined head that gives the impression of larger ears. Their chests are not as deep as a Greyhound's and should not reach the point of the elbow. (Source: Wikipedia.org, CC BY-SA)