The Mishnah had taught: Beis Shamai prohibit taking a bird unless he shook it before Yom Tov.

Question: The opinion of Beis Shamai has been switched - as the (later) Mishnah teaches - R. Eliezer also said that a person may stand over Muktzah (items that must be designated for Yom Tov use) on Erev Shabbos during Sheviis and declare, 'I will eat from here tomorrow' (and on Shabbos it is considered that he has retroactively selected those fruits - known as Berairah). Was R. Eliezer not a student of Shamai (and in our Mishnah, we do not rely on Berairah)?

Answer: We are stringent with a living creature.

The Mishnah had taught: Beis Hillel permit standing and declaring, "I am taking this one and this one''.

Question #1: The opinion of the Rabbanan has been switched - as the (later) Mishnah teaches - the Chachamim say that he must mark them and say 'from here to here'; but here they said that (a mere verbal declaration is enough).

Question #2: Furthermore, they have the stringency that they are living creatures?

R. Yosa bei R. Bun: Levi's custom was to (merely) knock on the dovecote (rather than shake the birds) before Yom Tov and say, "My dovecote should merit for me for tomorrow''.

(Mishnah): If he designated black birds and he found white ones, white ones and he found black ones; two and he found three, they a prohibited.

If he designated three and he found two, they are permitted.

If he left them inside the nest and he found them in front of the nest, they are prohibited.

However, if they are the only birds there, they are permitted.

(Gemara): The Mishnah (see (b) above) follows Rebbi, as the Beraisa teaches that if he left 200 Zuz (of Maaser Sheni money) and (then sent his son to retrieve it and his son) found only 100 Zuz, one hundred was left (from the Maaser Sheni) and the other hundred was taken.

The Chachamim say (he found) Chulin (non-Maaser).

The Mishnah (in Maseches Maaser Sheni) teaches: If a person tells his son that there is Maaser Sheni in a certain corner and the son finds it in a different corner, they are Chulin (not Maaser Sheni).

R. Yaakov bar Acha quoting R. Yasa: The author of the latter part of that Mishnah is Rebbi, as the Beraisa teaches - Rebbi says, if there were two hundred Zuz and he only found one hundred, one hundred was left and the other hundred was taken. Chachamim say that it is Chulin.

He later retracted: The Mishnah actually follows both opinions - chicks are different since it is normal for them to fly away.

Question: But R. Chalafta bar Shaul taught that the law of the chicks is the same as the law of the eggs - meaning that the author must be Rebbi, not the Rabbanan?

Answer (R. Yosa): (The Mishnah can follows all opinions) - There (in the case of Maaser), the father left it and the son found it (so perhaps the father forgot and had already taken it to Yerushalayim or perhaps he mistakenly said the wrong original amount); here, he left it and he found it.

R. Ba bar Kohen quoting R. Acha to R. Yasa: R. Ba bar Zavda instructed like Rebbi in Maaser Sheni.

R. Yudan: (The law in (c) above) only applies when there were two nests, but if there was only one nest, they are permitted.

Question: But the Mishnah taught that if they are the only birds present, they are permitted?!

Answer (R. Yosi bar Bun): (The Mishnah could be referring to) when there was only one chick (designated inside and only one chick found outside) {or only one nest of black chicks}. (Note: Some texts remove the last phrase)

Shmuel: One who replaces (attaches) the boards of a stall is liable for the Melacha of construction. (Note: The Ridbaz writes that this section of Gemara is printed out of place and is relevant to the end of Halachah 6 - corresponding to Daf 11 in the Bavli.)

Question: Would Beis Hillel permit something that if done on Shabbos involves the obligation to bring a Chatas offering?

R. Chananya quoting R. Yochanan: They permitted the end (replacing the boards) on account of the beginning, as if you say that he may not replace them, he will not open the stall.

Question: Let him not open it?! It will cause a reduction in the celebration of Yom Tov.

R. Acha: He may replace it but not fully.

R. Yosi bei R. Bun: When there is no other opening; but if there is, let him use it by transferring through the other opening.