Causes and preventive methods of stillbirth in piglets
1, prenatal:
Piglets are too big, parvovirus, leptospirosis, blue ear disease, stress, feed error or mycin, etc. These are the main causes of stillbirth before delivery. According to the size of stillbirths, analyze them.
2. Delivery time:
① A large number of piglets died due to delivery problems or large litter size.
② The stress caused by late or premature intervention leads to dystocia.
(3) Sows can't give birth due to uterine rupture or oxytocin is used unreasonably. Calcium deficiency, selenium deficiency, vitamin E deficiency and pelvic stenosis can also cause stillbirth.
3, postpartum:
A large number of piglets died immediately after delivery, which may be caused by excessive litter size, cold or premature labor induction. If pigs are in poor health, piglets will be weak at birth. So it is very important to ensure the health of sows. In the process of raising pigs, if there are a large number of stillbirths, we should pay attention to them. If possible, the sow should be tested for antibodies and then a solution should be made quickly.
How to reduce the stillbirth of sows?
1. Sows must be fed in a limited amount before delivery, that is, from more to less before delivery and from less to more after delivery, in order to prevent postpartum indigestion of sows. In order to reduce the adverse effect of gastrointestinal overload on farrowing, sows began to limit feeding three days before delivery (based on the expected date of delivery). The standard of feed restriction is: 3 kg per head per day on the third day before delivery, 2 kg per head per day on the second day before delivery, and 1 kg per head per day on the first day before delivery. When the sow gives birth, don't feed it at dinner, but feed it 0.5 kg every half day. Such as sows giving birth in the morning. Give birth in the afternoon, stop feeding in the afternoon, feed 0.5 kg in the morning and 0.5 kg in the afternoon on 1 day after delivery, 2 kg per head on the second day after delivery, 3 kg per head on the third day after delivery, and feed freely on the fourth day after delivery. That is, limit the feed from more to less before delivery and from less to more after delivery to prevent postpartum indigestion of sows.
2. Strengthen the feeding management in production, control the physical condition of sows during delivery, and prevent them from being too fat or too thin. In actual production, the physical condition of sows should be full back, flat upper line and no prominent bones. There should be pits below the lumbar spine, behind the ribs and in front of the pelvis, and there should be no pits for obese sows. Therefore, before 98 days, pregnant sows should be restricted according to the law of fetal growth and development and the fatness of sows; Eating freely from 0/00 day of pregnancy to 3 days before delivery can not only improve the newborn weight of piglets, but also prevent sows from being overweight.
3. Prevent the sow from constipation before delivery. It is suggested that mixing 1% sodium sulfate and 0.5% rhubarb soda powder 1 week in the feed of sows before and after delivery can make sow feces soft and moist, which is beneficial to smooth defecation. Conditional pig farms had better use lactation.
4. The heatstroke prevention and cooling of pregnant sows should be strengthened in summer. Especially for sows in the late pregnancy and sows in the delivery bed, the feeding position of pregnant sows is limited, the density is high, and it is difficult to dissipate heat. Especially in the third trimester of pregnancy, the sow's food intake increased, and her body temperature increased after eating, which was about 0.5℃ higher than that before eating, reaching 39.5℃. When the temperature of the pregnant sow 102- 1 10 is kept at this temperature for a long time, it will give birth. Therefore, when the ambient temperature reaches above 30℃, it is suggested that pregnant sows in the breeding house should be sprayed every half hour to cool down, and parturient sows in the delivery room should be washed to cool down, so as to minimize the impact of heat stress on sows.
5. Do a good job in vaccination, prevent sow reproductive disorders, and treat sick pigs in time, especially fever sows. In order to reduce the stillbirth rate of piglets during sow delivery, it is necessary to strengthen feeding management from production and give priority to prevention.
6. Keep the garbage room quiet. As far as the delivery room is concerned, it should be as quiet as possible, especially for primiparous sows. When sows are restless, massaging their breasts can make them quiet, which is of great significance to promote smooth delivery.
These are the causes and prevention methods of stillbirth. After the occurrence of stillbirth, we must handle the stillbirth well to avoid causing diseases. In addition, we must do a good job in nursing sows so that they can recover as soon as possible.