Honeybuns, any food that isn't chocobo feed is good for humans.

[Honeybuns? Wait, that's coming from a huge guy with a gun on his arm, balancing a pile of chocobo feed in a box near the farm entrance Courier is hanging around at.]

Other than that, it's pretty easy to determine what food is good for people. if y'all not feeding it to your talking dog, then that's good nuff for you.