As a general rule of thumb, any in-store prepared food in a large grocery store (the ones that come in the store's own packaging) was probably raw food that had been sitting for ages and they couldn't sell in time. They'll literally cut mold out of fruits and slice up the rest for those plastic platters. Every time they re-print a label, it resets the expiry date and you have no idea how many times they've done that and just shuffled food around by turning it into different forms.

CBC Marketplace video: https://www.youtube.com/watch?v=ZxCT_D6HBd8