I'm Alive (That Was The Day My Dead Pet Returned To Save My Life)
Mr. Cooper and his spiritual companion animal inspired a bit of magical/divine goodness...
Perhaps you had a stalwart war dog, well trained and fearsome; or a dungeon terrier, bane to vermin and quick to alert you of creeping foes; or maybe just a loyal hound, who followed you off the farm as you left to seek adventure. In any case, they were a good dog.
But adventuring is as hard on dogs as men, and they met their eventual demise.
However, old Bowser went to heaven (as all dogs allegedly do) and put in a good word for you. The Canine Gods heard this, saw that you had been a fair and kind owner and smiled upon you.
An incorporeal canine, the spirit of an old adventuring companion, follows their former owner for a period of one year (+1 year per charisma bonus). The original animal must be mundane, and may not have been a summoned creature, such as a magic user's familiar, or druid's animal companion.
The Dead Pet is invisible and generally goes unnoticed, even by its owner. However, once per day, the Dead Pet may provide aid or interpose itself between the former owner and danger in one of the following three ways: