"Mark Shaw" > wrote in message
...
> Last Sunday I bought a couple of pork shoulders for sausage from
> Costco. I got busy, though, and they stayed on the bottom shelf
> of my fridge until yesterday (Friday) evening, at which point
> they were four days beyond the "sell by" date. They were sealed
> in plastic (I think the name for this kind of packaging is Cry-o-
> vac).
>

I've done that often. Never had a problem.