Inexpensive and versatile, chicken is a mealtime staple in households across the world (including ours). Deep-fry it, drown it with cream sauce, stuff it with tomatoes and cheese, or roast it with nothing more than a sprinkling of salt and pepper—this bird has a knack for reinventing itself throughout the week. Honestly, we rarely give chicken a bad review because we rely on this trusty bird to satisfy our appetite on the regular. The exception to the rule is an obvious one: Poultry that has turned putrid. Fortunately, you don’t need a degree in food science to know how to tell if chicken is bad. By relying on your senses (that’s sight, smell and feel) and checking how long that pack of chicken thighs has been in the fridge, you can make sure that your poultry is safe to eat. Here are the four signs to look out for.