Connection and alignment with pigs:
'Piggy was surrounded' 'shriek of terror'
'The pigs lay, bloated bags of fat'- very similar to how P is described before his death- 'Below [Roger], Ralph was a shock of hair and Piggy a bag of fat.'
Foreshadows Piggy's death.
Think about the other meaning pigs have in the book; the pig's head, which represents the inherent evil of mankind. If we look at it this way, the fact that even Piggy, the voice of reason, is aligned with pigs, suggests that evil is present ineveryone.