1. If you want to know that weaned sows do not come into heat, you first need to understand the reasons for not estrus, and summarize the main points as follows:
Sow overfattening: If the sow is overfed during lactation, or if it is not properly reduced after weaning, it will cause the sow to become overfattened and thus not in heat.
Sow too thin: If the sow is malnourished during lactation, or if the feed nutrition is not properly increased after weaning, it can cause the sow to be too thin, which can affect estrus.
Improper feeding management: If the sow feeding management is improper, such as not cleaning the pig house in time, feed mildew, etc., it will affect the health of the sow, thus affecting estrus.
Disease impact: If the sow suffers from metritis, **inflammation and other reproductive system diseases, it will affect estrus.
Environmental impact: If the sow is in a harsh environment, such as too high or too low temperature, poor ventilation, etc., it will affect the health and estrus of the sow.
Second, after knowing the reason why sows do not estrus, the need for targeted human intervention mainly has the following points:
Adjust feeding management: for over-fattened sows, the amount of feed should be appropriately reduced, and the amount of exercise should be increased; For too thin sows, feed nutrition should be appropriately increased to improve feed quality. At the same time, the pig house should be cleaned in time to maintain environmental hygiene.
Increase vitamin and mineral intake: Providing sows with adequate vitamins and minerals can improve the sow's resistance and promote estrus. Moderate amounts of vitamin E, vitamin A and minerals can be added to the feed.
Medications**: For sows with diseases of the reproductive system, it should be carried out in a timely manner**. It can be done with medications such as antibiotics, anti-inflammatories, etc.**.
Environmental control: Maintain a suitable ambient temperature and humidity to avoid the impact of high or low temperatures on sows. At the same time, it is necessary to maintain good ventilation to avoid the impact of harmful gases on the sow.
Reweaning: For sows that have not been in heat for a long time, reweaning can be considered to stimulate the sow to come into heat. When reweaning, pay attention to the weaning method and time, and do not overstimulate the sow.
Culling treatment: For sows that have not been in heat for a long time and cannot recover, they should be eliminated in time so as not to affect the production performance of other sows.
3. Preventive measures.
Strengthen feeding management: During lactation and after weaning, sows should be fed reasonably to avoid overfeeding or malnutrition. At the same time, the pig house should be cleaned in time to maintain environmental hygiene.
Reasonable grouping: Reasonable grouping should be carried out according to factors such as the breed, age, and weight of the sows, and mixed group feeding should be avoided.
Regular inspection: The health status and estrus of the sow should be checked regularly, and problems should be dealt with in time.
Vaccination: Sows should be vaccinated regularly to prevent the occurrence of infectious diseases.
Establish health records: Establish health records of sows to record the health status and production performance of sows so that problems can be detected and dealt with in a timely manner.
In short, the problem of weaned sows not estrus should be analyzed and dealt with from the aspects of feeding management, nutrition, disease, and environment. At the same time, preventive measures, regular check-ups and vaccinations should be strengthened to improve the health and performance of sows.