1. The color of fresh fat sausage is generally gray, but if the color is dark, or even black spots or red spots appear, it is not recommended to buy or eat.
2. In addition, the gastrointestinal function of pigs is similar to that of human body, and it is normal to eat by bile secreted by gallbladder to help digestion, and occasionally green intestinal segments appear.
3. When dissecting the pig with a knife, the visceral gallbladder ruptured and polluted the stomach. This kind of intestines can be cut off with a knife and scissors, and the rest can be eaten.
These are the possible reasons why the fresh fat sausage appears in two colors. In this case, it is recommended that you consult a local master or professional with relevant experience to ensure food safety.