A more practical and accurate way to make estrus sows more suitable for timely mating is to grasp the traits of the sow after estrus, and to select breeding opportunities based on characterization. This can be summarized as “four look”. A look at the pussy: estrus sow pus from the red and red swollen into dark purple, swelling began to subside, there wrinkles; Second look at the mucus: estrus sows out of the vulva flow thick mucus, often sticky grass; three look expression: estrus sow Sluggish, hi bed, people touch their backs with their hands, stand still, ears straight, hands on the buttocks, neither refused, but to move closer to the direction of the hand, this time breeding, the highest rate of conception; four to see the age : As the saying goes: "The old match is early, the match is late, and the old is not in the middle." Both the aged sows have a short estrus duration and the estrus breaks in the afternoon; the gilt (younger) has a long estrus duration, usually in the third The days of middle-aged sows (sow sows) should be allocated on the second day. As long as the proper mating is mastered, general breeding can be done once. However, in order to ensure the concept of abortion and increase the number of litters, repeat breeding is usually carried out, that is, the same boar is used once every 8 to 12 hours. In short, do not walk in the buttocks, stupid idiot, breeding fetus, pussy sticking grass best breeding.

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