To prevent mastitis after sow weaning, some pig farmers began to reduce the supply of concentrates, green feed and water 3 days before weaning, and some also only supplied water on the day of weaning. These incorrect feeding methods, It often leads to delayed estrus. In fact, whether or not cuttings before and after weaning has nothing to do with mastitis. Because the pig's breast structure is very special, it is not the same as cows. There is no milk pool in the sow's breasts, and milk can not be stored. Therefore, mastitis is not induced by storing too much milk. The most effective solution to sow dry milk is to allow the sow's milk to accumulate in its breasts. It is the accumulation of milk in the mammary gland that causes an increase in the internal pressure of the mammary gland, thus stopping the formation and secretion of more milk, without necessarily passing through it. Reduce milk, cut water, and cut off milk to reduce milk. It is a common problem that sows are not estrus at weaning, and one of the reasons is excessive weight loss during lactation. The primiparous sows are particularly common because their own development is not completed and the nutritional needs of fetal development and lactation are also guaranteed. Sows with poor body condition at weaning often show delayed estrus. Therefore, 3 days before weaning, we should not reduce the material, and we should not break the material on the day of weaning. If conditions permit, empty sows containing vitamin E, vitamin C, carotene, choline, methionine, etc. should be fed. At the very least, we must continue to feed the lactating sows to estrus, instead of feeding pregnant sows. Because the content of the above-mentioned nutrients affecting estrus and ovulation in the sow material for gestation sows may be insufficient, the estrus after weaning may be postponed or the number of litters may be reduced.
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