Dogo Guatemalteco

Dog

The Dogo Guatemalteco is a medium sized, mostly white breed of dog, which superficially resembles the Dogo Argentino but is of separate origin. It was bred by the Gallusser family in Guatemala in the 1930s, and, for the most part, continues to stay there, save a few exceptions in the U.S. This breed was once known as the Guatemalan Bull Terrier, but recently the name has been changed.

http://en.wikipedia.org/wiki/Dogo_Guatemalteco