Xoloitzcuncli dogs , Mexican hairless , this is a primitive breed . Is one of the only dogs that evolved into what they are . This breed is originally from Mexico , Veracruz, Oaxaca , Mexico, Guerrero . Once almost extinguished. Temperament , loyal, smart , hypoallergenic, also a great history on there shoulders. The Aztec dogs . Xoloitzcuncli can born with hair also .