Grooved meat refers to the neck meat of the joint between the pig's head and the trunk. Behind the ear, it is a pig of two or three hundred kilograms. The meat in the trough does not exceed 20 kilograms. The pork here is not liked by people. Second, the meat here is usually where pigs inject more meat. The second is the trachea of pigs, with more blood vessels and lymph nodes (glands). I think many pig farmers are using it. Drowning drowned the pig. Pigs eat a lot of bacteria and viruses. The most concentrated place is this lymph node (gland). It's not suitable for eating too much.
However, in fact, when this material was lacking a long time ago, this piece of meat was still very popular. For other reasons, many people are still willing to buy it and take it out carefully, clean it and eat it. However, sometimes when you kill a pig at home, even if you don't lose meat, the elders at home won't let the children eat because they are not good for health.
Therefore, in a word, "trough meat" is a piece of meat that contains pigs and contains more harmful substances. There are pig immune glands and other meat containing more substances that may be harmful to people. So if you don't eat it, don't eat it. Even if you are "diligent and thrifty", you must take safety and hygiene as the premise. Otherwise, it may cause little loss in the end.