As for many races the exact origin of Xolo is dubious. Name XOLOITZCUINTLE comes from the Aztec language "Nahuati" and is composed in fact of two words. XOLOTL: Aztec god and ITZCUINTLI - dog. The two words coupled are translated by "dog of the Xolotl god" and also, within sight of the specialization of the Xolotl god "dog which leads the heart of dead towards the country of the spirits". Currently and according to countries' the "xolo" is called: Mexican naked dog, but also mexican hairless, xoloitzcuintli, perro sin pelo mexicano, mexikanischer nackthund etc.....

In the Mexican area of Colima, the Indians buried their deaths with a statuette of xolo to guide them in the voyage towards this paradise. From where the reference frequent with the "dog of Colima". These statuettes are held today by many collectors.
For a long time it had seemed acquired that the dogs were introduced in Latin America by the first Spanish colonists.
This thesis is precisely contradicted by the statuettes of Colima.
One of the first missionaries Jesuits unloaded in Mexico, the Sahagun father left us documents written on the dogs that it discovered there:
"Here the dogs are called Chichi, Itzcuintli, Xochiocoyoti, and Tetlamin. There are various colors of them: blacks, white of the gray, the multicoloured ones. The large ones and the very small ones. These dogs have all large sharpened teeth but are generally well domesticated and follow their Masters everywhere. They nourish bread, of but, raw or cooked meat but also of carrions. There are Indians who raise dogs that they call Xoloitzcuintli without hairs of the whole. They were not surely born thus, but must lose their hair by the action of the resin whose their Masters coat their body. The Indians raise and fatten other dogs called tlalchihi which are short on legs and which are excellent to eat "
It is generally allowed that the dogs arrived to America with the first populations which crossed the strait of Behring. The xolo would be thus downward dog of Mandchourie, Tai-Tai, now called Chinese Crested Dog and which exists in China since good a long time. This does not explain the fact that a cranium of xolo was found in Mexico and that it was dated between 1000 and 1300 front. J.C. whereas the oldest bones of Tai-Tai hardly exceed thousand years. This last discovery would tend to prove that the xolo is one of the oldest races of dogs, several times millenium without to have undergone notable modifications.

THE NUDITY :
It is the principal characteristic of the race and it is undoubtedly genetic. When and how the change intervened, one is unaware of it. The thesis which the absence of hairs is due to a semi-lethal gene dominating is generally allowed. What does that want to say? Each individual, for a given physical character, comes carrying 2 genes, one from the father and the other resulting one from the mother. The aspect (phenotype) will be determined by gene dominating.
If, to simplify we name recessive gene carrying hair small p and gene dominating inducing nudity large N, and that one admits semi-léthalité this one, all the alive xolos have the genetic signature Np and are thus hétérozygotes.
Indeed the homozygotes pp are coated dogs and homozygotes NN do not meet bus they die either in an embryonic state or with the birth or little afterwards.
But that wants to say also that it is impossible by marrying two xolos naked to have only pups without hair because, obligatorily and statistically two xolos adult produce in 25 % of case of the homozygotes pp which have hair, in 25 % of the cases of the homozygotes NN which are not viable and in 50 % of the cases of the hétérozygotes Np viable and naked.
Not to recognize as pertaining to the race the coated xolos is an administrative nonsense. To encourage the stockbreeders with the euthanasier is delicate and suicidal for the race.
To accept the "coated" and to make them reproduce between them (all their pups will be hairy) is to deprive itself of the principal characteristic of the race: nudity.
It is also true that all xolo cross with another race with hair will produce statistically and obligatorily 50 % of hairless pups.
This last point, associated the scarcity of the xolo was certainly at the origin of its crossing with other races and the hairless individuals remain carrying (genotype) gene p not exteriorized characterizing nature the hair, length, runs, hard, buckled, etc of the intruder.
Our wish of official recognition of the coated xolo will run up against the delicate problem to know to determine of which nature will have to be its hair.
TO LIVE WITH A XOLO
The skin of the xolo must be soft and smooth. It is desiccated easily and needed to be protected by creams and lotions, particularly after a bath. It is as sensitive as ours to the sunstrokes and the burns can be very serious. There still prudence and protection are required. The fur protects the dog against the blows and especially against the scratches and the abrasions. It is not the case of the xolo which of this fact is wounded easily because it has the same sharp and carefree behavior of its congeneric. Its ears are quite as delicate and fine. Their set up port requires the use during long weeks of bindings and other bonnets. The teeth determined by same genes as those which govern the growth of the hair are not never complete. Contrary to the legend, its body temperature is identical to that of the other dogs (38°-39°) and the feeling that the xolo is hotter is due to the direct contact of our hand with its skin, without the effect isolating from the fur
CCCE