I could be wrong, but I believe (because of depressions) dog food needs to be human edible.
I personally feel bad when I feed my dogs shitty treats. So yeah, I taste them. Turns out the chicken jerky is actually pretty good. Like I would probably buy some marketed for humans. Everything else is shit. My dogs generally have a similar reaction (expressed by their eagerness to eat what I have).
Aside from that, dogs generally prefer the stinkiest treats you can find.