The meat quality of livestock and poultry in free-range state is definitely higher. Therefore, free-range pig raising will definitely be more popular in the high-end market in the future. But for farmers, the free-range farming model also has many potential troubles, which is more difficult than the closed farming in pig farms. Pigs in captivity usually eat and sleep, which is quiet, not too wild and not aggressive. However, raising pigs is different. Because pigs often run outside, they have a big temper and are easy to fight. If a pig is injured in a fight, it will easily lead to stress or other bad situations. Pigs are generally raised separately. Although there are big circles and small circles, pigs are separated after all, and circles are isolated from each other. The advantage of this is that if pigs in one circle are sick, it is not easy to infect pigs in other circles, and it is also convenient for farmers to treat them in isolation. But it is hard to say that the whole group is free-range. Once a pig gets sick, it is easy to infect the whole group.

As we said before, free-range pigs are more likely to fight, so it is especially bad for those pigs with weak individuals. If pigs are not very average in size, they are probably too weak to live together. From the point of view of feeding, it is undoubtedly easier to control the feeding quantity by raising pigs in pens. As long as the feed intake of each pig at each stage is calculated, it can ensure that pigs gain weight quickly and gain meat quickly. However, it is not so easy for free-range pigs to ensure food intake. They may eat a lot at the last meal, and they may starve to death at the next meal because of insufficient intake. So this is also an important reason for the slow growth of free-range pigs. For free-range pigs, strict standards should be adopted when selecting pigs to ensure that the individual size and strength of pigs are the same. Pigs should have regular physical examinations. Pigs turn around every day. It's best to watch carefully to see if they are sick. Once pigs have abnormal symptoms, it is best to isolate them in advance.

There are three main sources for villagers to buy pigs, and 75% of farmers buy them from pig vendors in nearby markets. At the time of purchase, 90% farmers pay little attention to pig inoculation and pig varieties, and only choose pigs according to their own experience, which will increase the incidence of pigs, improve the success rate of pigs and reduce the production efficiency of pigs. 20% farmers in Kimura buy piglets. Due to the lack of the guidance of relevant technicians and the negligence of village epidemic prevention personnel, farmers hardly vaccinate piglets, which increases the prevalence of pigs. 5% farmers can support themselves. Due to the limited technical ability of farmers, sows can not be properly raised and managed during estrus and pregnancy, resulting in low litter size and confusion.

Among the 100 rural free-range households interviewed in this survey, 90% farmers have unscientific feeding methods, irregular feeding time, and uneven feeding once in the morning and evening, which has long caused digestive system disorder, low feed reward and slow growth of pigs. The mix of feed is also unreasonable. Most farmers choose to feed pigs raw with concentrated feed of corn, rice bran or agricultural and sideline products. When farmers use concentrated feed, they do not add it according to the feed instructions, but add less to save feed, resulting in malnutrition. This kind of feed can not meet the growth needs of pigs at different stages, resulting in low population weight gain and prolonged feeding cycle. Generally, it takes 7-8 months for rural pigs to be slaughtered, which is 2-3 months longer than that of large-scale pig farms. The aquaculture yield is high and the economic benefit is low.