032: Blood of a koy cannot be covered on Yom Tov.
Rabbi Zeira learned a Beraisa: In addition to a koy, whose blood cannot be covered on Yom Tov, blood of a Beheimah and Chayah which were mixed together, can also not be covered up on Yom Tov.
Rabbi Yosi bar Yasina’ah: This is only true if it cannot be covered with one dig of the shovel, but if it can be covered with one dig [and no extra unnecessary effort is made on Yom Tov], it is permitted.
Question: Isn’t that obvious?
Response: One might think that we would be concerned that if we allow one dig, he may dig agin [out of enthusiasm for the mitzvah], so we’re learning that there is no such gezeirah.
Rabbah: A bird which was slaughtered before Yom Tov, may not be covered on Yom Tov [Beis Hillel only permitted kisui so that people would have meat on Yom Tov (030, 032), but in this case he could have covered it before Yom Tov].
[On Yom Tov it is forbidden to separate Terumah (which includes Challah), but it’s a mitzvah to bake fresh bread, for this reason, a special permission was given for separating challah on Yom Tov.] If one prepared a dough before Yom Tov, he may still separate Challah on Yom Tov*.
*[Maharam explains the difference between kisui hadam and hafrashas challah. Beis Hillel never allowed slaughtering and kisui on Yom Tov, only b’dieved they permitted using a shovel that had already been stuck in the ground. But Challah is permitted as a matter of course, so it is also permitted when the dough was formed before Yom Tov.]