This ancient breed was named after the region in northern Mexico where it might have originated. The Chihuahua's origins are uncertain. It might have been brought to Mexico by the Chinese; yet it is more likely that it descended from various Aztec ancestors, including the Techichi. The Chihuahua was a favorite sacred animal of the Aztecs, who consumed the dogs as holy food and sacrificed them to the gods. The Chihuahua also brought good luck to the home. Several specimens are thought to have been brought to Spain during the Spanish conquest. The Chihuahua was first bred in the United States in the 19th century. The breed soon became highly prized and was recognized by the American Kennel Club in 1904. He arrived in Europe after World War II. In 1995, the FCI recognized a new standard with a weight range of 1 to 6 1/2 lbs., but a weight between 2 to 4 1/2 lbs. is still preferred. The Chihuahua is now reputed to be one of the most popular small dog breeds in the world.