Healthy chicken skin, without any spots; Dead chickens often have purple bleeding spots, even dark red diffuse bleeding, and some will have red or yellow pimples.
Second, look at the smell.
Fresh chicken has the normal smell of fresh chicken; Deteriorated chicken has odor such as bloody smell and rancid smell on the surface and deep layer of meat.
The third is to look at elasticity.
Fresh chicken is tight and elastic, and it will recover immediately by pressing the depression with your fingers; The rotten chicken has been rotted seriously, and the tissue has lost its original elasticity, leading to different degrees of decay. If you press with your fingers and sink down, not only can you not recover, but sometimes your fingers can pierce the meat.
The fourth is to look at the muscles.
Healthy chicken is generally red or reddish with bright luster and little liquid flowing out; Dead chickens are red and purple in color and dull, and dark red blood oozes when squeezed.