Shrinkage is actually the mixture and contents of grass juice and gastric juice that are not fully digested in cattle stomach and small intestine. When slaughtering cattle and sheep, take out the gastric juice and filter it clean. When the beef and mutton are cooked, add a proper amount.
Cooked cattle and sheep are yellow-green, slightly bitter at the entrance, have the effects of strengthening the stomach, removing heat and helping digestion, and are regarded as top-grade hospitality by ethnic minorities in southeastern Guizhou.
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The difference between cowhide and cow dung.
Before the grass eaten by cattle is digested, kill the cow and use it to make a flat beef instead of cow dung. Beef flat is made of undigested food in cow's stomach, which can be said to be the smell of cow excrement.
There is a kind of food called "Niubian Hotpot" in Guizhou, which is called "Cow dung Hotpot" because of its unique shape. The so-called cow dung hot pot is a hot pot made by taking out the food that has not been fully digested in the stomach and small intestine of cattle, squeezing out the liquid and adding cow bile.
"Niubian Hot Pot" is a delicacy in Qiandongnan Prefecture, and the most authentic one can only be eaten locally. Before slaughter, feed the cattle with fine grass and Chinese herbal medicine. After slaughter, take out the undigested food in the stomach and small intestine, squeeze out the liquid, add bovine bile and seasoning, and put it in a pot for slow cooking.
This seemingly "cow dung" thing, named Niu Ping, is actually a liquid. It's an excellent dish of Dong family, which can only be eaten during the New Year. There are two kinds of this dish, one is taken from the small intestine, which is more expensive, and the other is taken from the large intestine, which is cheaper.
Baidu Encyclopedia-Niu Bian