I want to know if there's word of god to be had here.
What I did find is close, but not quite definitive:
Animals can eat zombies
Animals can drink zombie-contaminated water
Kirkman says people can safely eat other humans who have been bitten, but haven't turned yet (but doesn't say you can eat actual zombie flesh)
Kirkman says that drinking a bit of zombie blood isn't the end of the world (no pun intended)
So I'm looking for the missing piece of the puzzle:
Has Robert Kirkman himself ever commented on what would happen if a human ate zombie meat?
Note: I'm not interested in eating bitten people, or drinking a little zombie blood, because I have already read his comments on those subjects; I'm also not interested in what anyone other than Kirkman himself has said.