What is the ruling regarding an egg found fully formed inside a chicken that died?

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If a hen dies and an egg with a hardened shell is found inside it, the egg is pure. This is the opinion held by Abu Hanifa, some Shafi'is, and Ibn al-Mundhir. The justification is that although the egg was inside the dead animal, it is considered a deposited item, not intrinsically connected to the carcass. Furthermore, since the creature producing it creates something similar to its origin (i.e., another bird), it resembles a living offspring emerging from a dead animal. The aversion shown by some Companions is considered merely a detestation (*tanzihi* aversion), based on dislike rather than impurity.