In the past 2-3 years, the management of sows in many pig farms in the Netherlands has shifted toward the direction of prolific milk production. In spite of the adjustment of the sow's feeding level, the amount of breast milk per piglet is still insufficient because of the increase in the number of litters per sow per year. Some experts remind producers to supplement suckling piglets. Traditionally, sows are fed less and more than a few hundred grams of feed after and after farrowing. The new feeding method encourages sows to feed very similar amounts during different stages of pregnancy. If sows are not particularly lean, they are normally fed 2.4 kg of feed per day during the first 7 weeks of pregnancy, and the amount of feed can be increased to 2.8 kg per day for 8-12 weeks, and 3 kg per day for 4 weeks after conception. If the sows are given too much feed a few days before farrowing, the more fat sows will eat too much before eating, and the feed intake will decrease after delivery, and in addition it will be easy to have no milk. Due to the reduction in the amount of feeding in the later stages of pregnancy, it is necessary to supplement the resulting shortage of trace elements and vitamins. The specific approach is: Nutrients in the days before and after childbirth. Practice has shown that using this method can increase the vitality of newborn piglets, so that piglets can find nipples more easily, and at the same time, it can also promote early recovery of sows after delivery. After confinement during pregnancy, sows are prone to constipation during childbirth. Therefore, one day before farrowing, 1% of the sow's body weight may be fed with 2 kg of feed, and the day of delivery may be reduced to 0.5 kg and plenty of clean drinking water may be provided. Gradually feeding after delivery, the first week can be gradually increased from 2kg to 4kg per day. By the 10th day, 5.5kg can be fed (sows suitable for suckling 9 piglets). Each additional piglet increases 0.4kg for the sow. The amount. Modern genetic breeding and management techniques have increased the number of sows and milk production in sows. Over the past 30 years, the average sow's milk production per sow in Western breeds has increased by only 100 ml, which is very difficult to compare with the 0.6-0.8 increase in sows’ litter size over the past five years. Piglets must be supplemented. Supplementation can start at 4 days of age in piglets, but the final feed intake of piglets can vary widely from zero to a few hundred grams. The reason for this change is mainly related to the type of sow lactation. If the sow has a very high milk production in the first two weeks, the piglet will eat more supplemental feed at 3-4 weeks of age, if the sow is producing in the last two weeks. With high milk intake, the individual will not be very large when the piglet is 3-4 weeks old, as there will not be much feed intake.
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