35 Shabbat 24/3-5 & Eiruvin 1/1

(3) One may not stuff a camel or force feed it, but one may put food into its mouth. One may not stuff calves, but one may put food into their mouths. One may put food into the mouths of chickens, and one may pour water into their bran, but may not knead it. And one may not put water before bees or before pigeons in a dovecote, but one may put [food] before geese and chickens and before Herodian doves.

(4) One may cut up pumpkins before animals and a carcass before a dog. Rabbi Yehudah says: If it was not a carcass on Shabbat eve [Friday, the animal had not yet died] it is forbidden [to cut it up] because it had not been prepared.

(5) One may annul vows on Shabbat, and may consult [a sage] regarding vows related to Shabbat needs. One may stop up a window, and one may measure a strip and a ritual bath‎. It once happened in the days of Rabbi Zadok's father and in the days of Abba Shaul ben Batnit, that they stopped up a window with a pitcher and tied a fire pot with reed grass to ascertain whether or not there was an opening of a square hand-breadth in the barrel. And from their words we learn that [in some circumstances] one may stop up, and one may measure, and one may tie on Shabbat.

(1) If a mavoy [an alleyway onto which courtyards open] - that [has an entrance with an opening that] is higher than twenty amot [a specific unit of length], one must lower [it in order to separate the mavoy from the public domain]. Rabbi Yehuda says it is not necessary. And if it is wider than ten amot, one must narrow [it in order to separate the mavoy from the public domain]. If there is a tsurat hapetach [two uprights and a crossbar, however slight, halachically effecting a doorway], even though [the entrance] is wider than ten amot, it is not necessary to narrow it.