Pet food is marketed to thepet owners, not to their pets. People judge it by whether it is appetizing to them. Dogs and cats will happily eat road kill.
For our dogs, the latest backyard treasure discovery was a ten-day dead groundhog whose innards had liquified.
A week ago, their final trip outside for the night turned into a full fledged carcass roll, and they came into the house with their heads and necks still dripping with those savory juices.
I have always maintained that dogs smell no bad odors. There are only good odors, interesting odors and boring odors.