I dont think it would hurt anything, people use ask to make ferts all the time. I hear the reason dog/cat shit doesnt work so well is that those animals tend to eat meat (not always, obv) and the meat's decomposition makes for bad ferts if done improperly.
hey man thats quite a concept , sorta like keith richard snorting his dads remains. i say hey man what better to do with the ashes besides ingesting them. at least with a pot plant it would filter it. i think its a beautiful concept. the circle of life
People, animals, and plants become carbon when burned, it would probably be good and
PH balanced and help your soil. If old sparky comes to you wagging his lil ole tail
let me know cause I'll consider smoking a dead finger then