Xoloitzcuintle (ZOH-loh-eets-KWEENT-lee), is a hairless breed of dog, It is also known as Mexican hairless dog. The Xolo is native to Mexico. Archaeological evidence shows that the breed has existed in Mexico for more than 3,000 years. Most likely, early forerunners of the Xolo originated as spontaneous hairless mutations of indigenous American dogs. Hairlessness may have offered a survival advantage in tropical regions.