[Ellie May]

I wouldn't just be worried about it getting wormy.
Dog food, especially "holistic" kinds that are preserved naturally can go bad easier than foods preserved with things like ethoxyquin. I would just be very careful if I was going to feed past dated food and talk to the company.

That is if that date was the expiration date.
If it is a best by date, there shouldn't be a problem except that it loses some nutritional value which I wouldn't be comfortable with either.