(Mishnah): If an egg was laid on Yom Tov - Beis Shamai say it may be eaten, Beis Hillel say that it may not be eaten (that day).

(Gemara - Question): What is the reasoning of Beis Shamai? It is not Muktzah, since it is prepared on account of its mother (that was not Muktzah at the onset of Yom Tov).

Question: What is the reasoning of Beis Hillel? It is like Muktzah fruit (such as a semi-dried grape or fig, that is inedible because of its moistness) when he was unaware that it had dried on Shabbos. Would it not be prohibited?

Question (Beraisa): If one slaughtered a hen and found eggs inside it, even if they are finished (so that they can no longer be considered a limb of the hen, which would have meant that they are permitted through the slaughtering), they are nevertheless permitted. (This Beraisa follows Beis Hillel, so why are the eggs permitted - even if they are found finished inside the hen they should be prohibited as he was unaware that they were finished?!)

Answer: Both R. Chananya and R. Mana explained that the case of a laid egg is different, but for different reasons - one said that the taste of an egg that was not yet laid is dissimilar to the taste of an egg that was laid.

The other one said that only an egg that was laid can develop into a chicken, (Therefore, the un-laid egg is certainly still considered to be food, like the hen that it came from.)

Query: At what stage of growth may eggs inside the hen be eaten with dairy products (as they are no longer considered to be part of the hen)?

Answer: If they are still attached to the spine with sinews, they are prohibited with milk.

All agree that if most of the egg was laid before Yom Tov, it may be eaten on Yom Tov.

Where is the dispute - when only part had been laid before Yom Tov - Beis Shamai say that it may be eaten and Beis Hillel say that it may not.

Just as it is prohibited to eat it, it is prohibited to move it (as it is Muktzah).

Even if it became mixed with one hundred or one thousand other eggs, they are all prohibited.

Question: This is fine according to the opinion that holds that if an item is doubtfully Muktzah it is prohibited. But how does this fit with the opinion that holds that it is permitted?

Answer: He agrees that it is prohibited here - they disagree in a case where there were fruits that might have fallen from the tree today (Yom Tov) and might have fallen yesterday (where they might not be prohibited at all); but here, there is certainly a prohibited egg - it just became mixed with many others and we are not certain which is the prohibited egg.