Sows are not still in estrus, can they breed?

Zhang Guofeng: after breeding, the diet of Sanyuan sows is greatly reduced or even not eaten. What is the reason for causing abortion in about 90 days?

Answer

Under the influence of mating stress, the appetite of sows will decrease within a few days after mating, and it is necessary to gradually increase feed intake until it is stable. If you don't eat for a long time, it is necessary to check the influencing factors such as feed quality (whether it is bad or not), drinking water, pig health, environmental temperature in the house and so on. Abortion at about 90 days is mainly related to diseases (such as blue ears, etc.), thinness of pigs, undernutrition (reproductive nutrition) and stress, etc. It is necessary to strengthen nursing care from the 90th day of pregnancy, such as increasing reproductive nutrition 1kg/t in feed, anti-disease nutrition Kangzhiyuan 2kg/t, enteral nutrition enteric source 1kg/t.

Cheng Xuebing: the teacher sow is not still in estrus. Can you breed?

Answer

Whether sows can be mated or not can not only look at static reaction, but also need to be combined with the degree of vulvar swelling, vulvar mucus color and vulvar mucus to determine whether to mate or not, especially vulvar mucus is very important. If it is found that the vulvar mucus is milky white and finger contact can be pulled into a filamentous shape, it means that the sow is ovulating in large quantities and can be mated immediately.

Feng: after mating, how to observe whether the sow is successful or not when the estrus is not obvious?

Answer

There are two ways. First, from 18 days after mating, boars can be used to check whether the boars have estrus (such as glassy eyes, erect ears, red and swollen vulva and mucus production or outflow); second, B-ultrasound machine can be used to test pregnancy 25 days after mating to observe whether there is a normal pregnancy sac image. Pigs that are not obvious can only be re-tested a few days later to ensure the accuracy of the test.

Inner Mongolia-Bayannur-Xu Wei: Mr. Chen, our sow step-by-step feeding method is also suitable for binary sows, does the feeding amount need to be adjusted at the same time?

Answer

It is also suitable for binary sows, and the feed quantity does not need to be increased. On the one hand, the loss of appetite will occur in sows after delivery, which has a lot to do with the recovery of gastrointestinal function. If the feeding amount is too large, it will cause accumulated food, thus affecting the food intake in the peak period. On the other hand, high feeding will increase the total amount of milk, but the total milk demand of piglets within 3 days after delivery is not high, resulting in milk can not be fully absorbed, easy to form back milk, the formation of mastitis, postpartum no milk and other problems.

Lesser Snow: after the reserve sow was bred for the first time, the genitals were red and swollen on the 16th day, and it has been like this for 5 consecutive days. Is that normal?

Answer

It's not normal. The vulva of sows will gradually atrophy after mating, if the phenomenon of vulva redness and swelling occurs about 18 days after mating, it is necessary to do a good job of investigation, it is recommended to use boars to induce emotion, the effect is the best.

Tang Xiaolan, Yuechi, Sichuan: can du Landrace sows be bred with du Landrace Boars?

Answer

Sure. However, in order to increase the litter size of ternary sows, it is generally recommended to breed Landrace boars or Landrace semen.

He Hongren in Leiyang, Hunan: the first one to breed is to fight classical swine fever. Is it okay to get pseudorabies vaccine?

Answer

In general, it is recommended that the sows should not be vaccinated within 1 month after mating, so as to reduce the effect of vaccine on the survival rate of embryos. If it can not be postponed, it is necessary to do a good job of anti-stress work, such as adding Oinmei 1kg/t 3 days before immunization (for 7 days); at the same time, the operation should not be rough, one needle per pig to prevent cross-infection.

Taohai: how to increase the litter size of the second birth of three-yuan sows?

Answer

On the one hand, sows must be fully cultivated in the reserve stage, the first estrus should be as early as possible, the number of estrus (more than 2 times) and state should be guaranteed; on the other hand, sows need to do a good job of uterine involution and moderate body condition before weaning. In addition, environmental conditions (boar inducement, care and temperature) and reproductive nutrition supplement will affect the estrus and litter. There are many factors affecting the litter size of sows, pig farms need to take comprehensive prevention and control measures, only on the one hand is not enough.

Gao Lijuan, Longjiang County: does Sanyuan sow dystocia have anything to do with positioning fence feeding? How to use drugs to improve

Answer

It matters. Long-term positioning fence feeding leads to lack of exercise, which leads to the degradation of cardiopulmonary function of sows, which is easy to appear the phenomenon of insufficient productivity in the process of delivery. It is suggested that the sows in the later stage of pregnancy should be adjusted to the semi-limit column (food restriction, activity limit) to increase the amount of activity; at the same time, adding Domenol 1kg/t 20 days before delivery can replenish qi, nourish blood and calm the fetus, and effectively shorten the delivery process of sows.

Hubei Province Cheng Gongrang: the test matched, also did not see miscarriage, a month later retest did not see the fetus, how to return a responsibility?

Answer

First of all, it is necessary to ensure the accuracy of the B-ultrasound test, and it is recommended to start the test 25 days after mating, so that it is easier to see the image of the pregnancy sac; second, it is necessary to distinguish between the image of inflammation and the pregnancy sac, which are often confused; finally, for pigs with doubts in the test, it is necessary to recheck after a few days, so as to prevent pregnant pigs from being missed.

Deng Zhiwei, East Guangdong: do you want preferential feeding in the second week after mating? Do you add eggs with lactation or pregnancy?

Answer

No need for preferential feeding. If the weight of sows is suitable (3 split fat), it is recommended that the feed should be less than 3kg/ / day, continue to use pregnant sows, and add more 1kg/t in the feed for long-term use.

Finn: Hello, Miss Chen. I have a sow that has been breeding for 15 days. I found a lot of white pus in these two days, and the urine test showed that I was pregnant. Do you need to clear the palace?

Answer

Don't clear the palace at will after sow breeding. First of all, to distinguish whether the discharge is inflammatory pus can be judged by the smell, color and consistency. Secondly, the boar can be checked manually or by boar to check whether the sow is pregnant 25 days after mating. After judging that the sows are indeed mismatched by the above methods, measures can be taken to clear the palace, such as infusion of Gongyanjing 100ml + lincomycin 20ml, intramuscular injection of 10ml Yi needle Kang antibacterial and anti-inflammation.

Wang doctor: with a sow that has been bred for 30 days, there is still a white secret in the vagina. what may be the reason?

Answer

On the one hand, it is necessary to check the estrus of sows by means of boar check and B-ultrasound detection; on the other hand, observe the color, smell and viscosity of secretions to determine whether it belongs to inflammation. It is suggested that after mating, pay attention to the hygiene of the hindquarters and hurdles of sows, keep them clean and dry; at the same time, check the feelings 18 days after mating, and treat those with inflammatory outflow in time.

Dongfu: lactation feed or pregnancy feed for weaned sows?

Answer

Weaning sows were fed with milk feed, combined with the actual physical conditions of sows, such as diet reduction of fattening pigs and feed increase of lean pigs.

Tan Yangshan's father: there are two backup sows whose water gate is too small to be in estrus. What should I do? They were mated in the same batch, and there was no response at these two ends.

Answer

Measures to promote estrus can be taken, such as boar chasing exercise, mixed culture, increasing light, restricted feeding, intramuscular injection of hormones, etc., if there is no effect, it is necessary to consider elimination.

Enjoy simple: how to deal with the reserve sows can be in estrus at the same time?

Answer

It can be fed with hormone (allyl progesterone), and the drug will be stopped after 18 days, and the sows will show estrus after 3-5 days, combined with the actual production needs of pig farms.

To know the heart of parents: can sow uterine inflammation be eliminated the next day?

Answer

If there is obvious pus, it is recommended that you first clear the palace + antibacterial and anti-inflammatory, wait for a period of estrus to match.

If it is mild, after you have handled it reasonably, the oestrus stillness reaction is still trying to match, but you should focus on her first estrus (whether she returns to estrus or not). There are both successful and failed cases of mating in this situation. it depends on luck, but at this time the environment in the womb is general, and the number and evenness of the baby will be affected to a certain extent.

Lu Shengwen in Hechuan, Sichuan: how to accurately grasp the time of mating

Answer

With regard to the mating time, you can generally distinguish between backup pigs, weaned pigs and estrus pigs. In addition, you know that ternary sows are irregular in estrus.

Backup pig: the time of estrus is longer, you can choose to match 8-12 hours after she begins to have static reaction, and then 12 hours later, if there is still standing reaction, 12 hours later.

Weaned pigs: weaned at normal time (less than 28 days old), estrus for 3-5 days, can be mated for the first time within 8 hours after static reaction, and again after 8-12 hours; after 5 days, it will be matched again after 8-12 hours; if it is weaned for more than 28 days, it will be matched again in 8-12 hours after weaning

Return to estrus pig: if there is no abnormality in the uterus, it will be matched when you find it (3 times).

Ternary sows: match if you have obvious estrus symptoms (2-3 times, do not have to wait for static reaction, in case you miss it)