Sour, rotten, or ammonia-like smell
Slimy or sticky texture
Gray, green, or brown discoloration
Mold growth
Package is bloated or leaking
Off taste
Past the use-by date
Left at room temperature for more than 2 hours
Left out for more than 1 hour if the temperature is above 90°F
Cooked meat that was stored too long in the fridge
Unusual dryness or tackiness combined with other spoilage signs
Any sign of spoilage after thawing
If it was stored improperly or you are unsure how long it has been out