"Some have speculated it could be a breed of dog called the Xoloitzcuintle, also known as a Xolo.

"It's been around for about 3,000 years in Mexico," said Rhett Rushing, a folklorist at the Institute of Texan Cultures in San Antonio.

The Xolo is a type of dog native to Mexico and Central America, and was considered a sacred dog in the Aztec culture. It bears similar resemblance to the gray hairless animal that is turning up all over South Texas.

"It was bred by the Aztecs both as a food source and a companion guardian, and it also had healing powers," said Rushing. the rest of the article here CLICK