There are many legends concerning these fantastic animals, where they are always depicted with well-defined roles: loyal companions of man like Argo or FIDO or even HACHIKŌ, or as guardians of the thresholds that humans cannot cross like Anubis, the Egyptian god, or Cerberus, son of Typhon and Echidna, his task is to supervise the access to Hades so that no dead escape and no living enter, or the protectors of souls such as the White Cadejo: supernatural spirits of Central American folklore, these spirits they appear to those who travel at night; the White one protects them along the way, and many others who with the passage of time have distinguished themselves for different abilities and actions.
