What is the birth weight of piglets? 6.7 jin? The relationship between litter age, body weight and feed intake

There is a litter of sows with a litter size of 12, one of which is very large, 6.7 jin, and the rest are about 2 jin. Have you ever encountered this situation? What caused it? The sow suffered a great loss and took out blood after delivery.

I met at the free-range care household.

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No

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I haven't seen it before. it's strange and has research value.

Must begin to induce food in 5-7 days, if half eat half milk when weaning, no wonder when weaning. Three days before weaning, the sow gradually reduced its diet, and remember that the piglet also began to eat, 80% full on the first day, 60% on the second day, and half full on the third day. Then the material is gradually added. After driving the sows away, no matter in winter or summer, in the south and north, immediately raise the temperature to 31-32 degrees, and then reduce the temperature by one degree a day until the normal temperature. Piglets had better be fed 80% full, and the digestive system was underdeveloped 60 days ago.