As we all know, there are many differences between gilts and adult sows.
(1) It is not as healthy as adult sows;
(2) problems are easy to occur during the first delivery;
(3) The thickness of the recoil and its contact with the boar should be taken into account in production;
(4) The interval from weaning to mating is generally long, which may easily lead to the normal operation of breeding and pregnancy housing;
(5) Low immunity leads to low resistance of its offspring, which was confirmed in isolation early weaning (SEW) and was also confirmed indirectly by the Danish asthma purification process.
In view of the above reasons, in order to maximize the role of gilts in future production, a sow sub-feeding method has been developed. The production process of the sow sub-feeding method is as follows:
In 1991, R. Robitaille, a farm manager in Quebec, Canada, told his consulting veterinarian Camille Moore (a famous Canadian pig and pig disease expert) that he planned to move the gilts to another site for breeding and then to conceive. The sow, 50 to 70 days old, was introduced to his own farm, when Camille Moore strongly disapproved. But by 1995, through four years of practice, the method was found to be very successful.
Traditional practice: the reserve pig is only pregnant, and the first birth is not used as a replacement pig for the old sow.
Repatriation: The gilts not only produce the first child, but also 50 to 70 days after the seed, and then enter the old sow group. In addition, piglets born to first-born sows and piglets born to more than two sows are also kept separately.
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