Sour, rotten, or ammonia-like smell
Slimy or sticky texture
Gray, green, or dull discoloration
Mold or unusual spots
Package is bloated, leaking, or damaged
Meat feels tacky after rinsing
Strong off odor after cooking begins
Past the use-by or expiration date
Left out at room temperature for more than 2 hours
Stored in the refrigerator too long
Freezer burn with severe discoloration or dryness
Unusual taste after cooking
Packaging seal is broken or loose