Do piglets weigh 6.7 jin at birth? The relationship between age, body weight and feed intake

One litter had 12 piglets born, and one of them was exceptionally large at 6.7 jin, while the rest were around 2-3 jin. Has anyone encountered this situation? What causes it? The sow suffered a lot of damage and bled during the postpartum examination.
Encountered at a free-range farmer's place
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No
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I have never seen it, it is quite unusual and has research value

Be sure to start creep feeding at 5-7 days. If they are still half on feed and half on milk at weaning, it would be strange if they did not get diarrhea at weaning. Gradually reduce the sow's feed 3 days before weaning, and remember that the piglets should also start reducing their feed: on the first day, feed them until 80% full; on the second day, about 60% full; on the third day, half full. Make sure they drink enough water. Then gradually increase the feed. After the sow is moved out, no matter whether it is winter or summer, south or north, immediately raise the temperature to 31-32 degrees, then reduce it by one degree per day until it reaches normal temperature. It is best to feed piglets until 80% full; their digestive system is not fully developed before 60 days.