There are mystical, unbreakable bonds between all members of the natural world including humans and animals. Whether or not we remember or acknowledge this relatedness, it still exists.
~ Elizabeth Eiler
Throughout Mesoamerica it was a common belief that a dog carried the soul of a newly deceased person across a body of water. According to the Aztecs, the first level of the Underworld was a place called Apanoayan (where one crosses the river) or Itzcuintlan (the Place of Dogs).