Well...

I probably shouldn't admit this, but I've used Meow Mix as bait in fish and crawfish traps before. Works well, better than the food pellets they serve fish in hatcheries.

Canned food would work as bait for traps targeting smaller predators and scavengers.


As for human consumption, grind/crush the dry into powder and use it with flour, turn it into a gruel or to thicken stock. The canned, soup or mix with a dry starch source and make patties. Not the best tasting option, but it would work. Pretty much anything a cat or dog can eat, humans can. But I also feed my animals better than the grade of horror that Susan mentioned.

Food for pet rodents, probably treat it like dry cat/dog food. Most bird seed is also edible as is by humans, or just needs cracking.