What's the sell by date and what does it smell like? It's all about how fresh it was when it was put in the case at the market. If you got it the minute it was put out, you should be fine, if it had been there for a couple of days, I'd give it the smell/pet test. My cats won't go near bad steak (I know totally unscientific). If it's within its date and doesn't smell bad, it should be fine.