Under normal circumstances, after the sows have produced eight litters of piglets, the litter rate will drop and the sows will be honorably retired. However, some sows will have some abnormal conditions during the breeding season, then This sow should be retired early.
The first type that should be eliminated is a sow that has had a viral infection. For example, swine fever, pseudorabies, and sows that have acquired such infectious diseases are cured with drugs. The next time they are born, they are likely to be re-occurred and transmitted to piglets. In order to avoid more economic losses, they should not Hesitantly eliminated this type of sow.
The second is the emergence of breast inflammation, uterine inflammation, a significant decline in the ability of suckling piglets, decreased lactation, must be eliminated. Think about it, I have a big nest of pigs, but I have no ability to feed it. Such a mother is definitely not competent. It is best to rush to resign.
The third type of sow that should be eliminated is a sow with defective limbs. For example, a sow with a lame leg will not only be affected by breeding, but also because it is not able to move normally, the constitution will not be good, even if the piglet is produced, the piglet It will not be healthy.
Another is that in the normal feeding process, the growth rate of piglets per birth is slow and the body shape is not good. Such sows should be eliminated. It is affected by the genetics of the sows, resulting in slow growth of piglets and finishing pigs.
The fifth species that should be eliminated is the sow that is difficult to succeed in breeding, that is, the use of drugs to promote it, but generally there will be difficulties in the next breeding, it is easy to cause empty, not breeding, resulting in economic losses. Such a sow can't keep it, so it's best to get rid of it early.
In addition, some sows are affected by genetics, the rate of birth is very low, and only three or four piglets per litter are produced. Such sows are also incompetent and must be eliminated in time.
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