No barking. Pig esophagus is often called pig esophagus, and red sausage is a food that is mainly made of pig intestines and meat, smoked with appropriate amounts of seasonings and spices. So the esophagus of a pig is not called red intestine. The pig's esophagus is part of the pig's digestive system, and its main function is to gradually transport food to the stomach for digestion and absorption.