I bought a couple of butts from Costco a few weeks back, and I froze them on the night of the sell by date. What I didn't think about was that these would take a couple of days to thaw in the fridge. Think these are still good? Noticed a minor funky smell when I opened the package, but then again, they always smell a little funky. Please let me know your thoughts. I am cooking for a large party this weekend, and don't want to chance anyone getting sick.