If the chicken is bad, it will often smell like spoiled milk or eggs.
Bad raw chicken can also have a strong ammonia-like odor due to the bacteria on the surface of improperly cleaned poultry. One of the most overlooked tasks in preparing food safely is proper hand washing after handling raw meat and poultry. Always wash your hands with soap and water before you re-enter any kitchen area, even if you are only touching spices, canned goods or other foods not meant for consumption; this removes residue from your hands that could contaminate other items on which they come in contact.