One who discovers finished eggs inside a chicken that he slaughtered, may eat them with milk. Rabbi Yaakov: If they were still connected to the ovary with tendons, it’s forbidden.
Question: Whose opinion does this Beraisa follow?
One who eats of the neveilah of a kosher bird [he becomes tamei and his clothing become tamei as well]; from the egg cluster (attached to the ovary), from the bones, from the ligaments, or from the meat of the bird while it was still alive: he’s tahor. If, however, he ate from the ovary itself, from the gizzard, the intestines, or from liquefied fat: he’s tamei [although these are unusual forms of eating, it’s still considered eating].
So who is of the opinion that eating of the egg cluster is tahor?
Rav Yosef: This is against the opinion of Rabbi Yaakov who holds that as long as the eggs are attached with tendons, they’re considered meat.

Some Say: Whose opinion is it that eating of the ovary makes one tamei?

Rav Yosef: This is the opinion of Rabbi Yaakov who holds that as long as the eggs are attached with tendons, they’re considered meat.

Abayye to Rav Yosef: Perhaps it is not referring to the eggs attached to the ovary but to eating the ovary itself. It is still necessary to teach this law, just as it is taught with regard to the gizzard and the intestines - since there are people who wouldn’t eat these parts, we’re taught that they are in fact considered meat.

[Chickens are daytime birds, they rise early but are not active at all in the nighttime] Beraisa: All those [living things] who copulate by day, give birth by day. Those who copulate by night, give birth at night. Those who are active both by day and by night, give birth both by day and by night.
Those who copulate by day give birth by day: refers to chickens.
Those who copulate by night give birth by night: refers to bats.
Those who are active both by day and by night give birth both by day and by night: refers to humans and others.

We Learned: “Those who copulate by day give birth by day: refers to chickens.” This is relevant to the case of Rav Mari brei d’Rav Kahana.

Rav Mari brei d’Rav Kahana: If one examined his chicken coop before Yom Tov and it was free of eggs, and he found an egg there early the next morning [before daybreak], it is permitted [because it was not laid at night, so it must be from before Yom Tov].

Question: But he examined it before Yom Tov?

Response: He must have not examined it carefully. Even if he did, perhaps the majority of the egg came out before Yom Tov but then went back inside, as taught by Rabbi Yochanan (025).

Challenge: It is not so! Rabbi Yosi ben Shaul quoting Rav: If one examined his chicken coop before Yom Tov and it was free of eggs, and he found an egg there early the next morning, it is forbidden.

Resolution: He is referring to a case where the egg is from the ground (024).

Question: If so, perhaps in Rav Mari’s case, the eggs were also from the ground?

Response: Rav Mari is discussing a case where a male is present.

Question: Perhaps the egg still came from the ground?Ravina: We have a tradition that whenever a male is present, the chicken does not produce eggs from the ground. 

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