The "cadejo" is an old myth from Chiapas and Central America: a dog apparition that terrorizes drunkards and night owls. It was said that, should you come across it, running was the only option...
Many versions of the myth have arisen, making the story old. The Mayans must've began it, only for it to continue being told.
Worry not, for there's another creature: the inverse of this one, the embodiment of good. If evil exist, so does its opposite.
Credits:
Mexican Hairless Dog Model by Uzay Çalışkan