Nowadays, the date of manufacture of goods can be altered, you can not simply look at the date of manufacture and shelf life to determine whether there is a problem.

The sourness indicates that it may have deteriorated, the supermarket stores sell corn dog sausage is mostly vacuum packaging, once there is a small hole small slit will be easy to deteriorate, and now the summer is here, the high temperature sweltering situation, but also the vacuum of the food deterioration.