For several centuries there have been hairless dogs in western Mexico and in coastal Peru  It is very unlikely that a trait as rare as hairlessness emerged on two separate occasions
Since the dogs have never existed in the wild, and the vast mountainous jungle separating these two regions would have made overland travel between them extremely difficult centuries ago, the dogs must have been transported from one of these regions to the other by boat, probably during trading expeditions
If hairless dogs were at one time transported between western Mexico and coastal Peru by boat, they were traded in exchange for other goods.