Same problem with one of the three packages of spares last weekend. All came from same store, same sell by date, etc., but one stunk terrible. Saved the tag and store refunded price. Not hard to tell if pork is bad. Any funky smell and I don't use it, not worth the risk.
Smooth Smoke BBQ Team, KCBS CBJ, 2-WSM, Cajun Bandit Conversion, wsm 2880, Smokey Joe Mini wsm, Old Country offset, several kettles.