001: One who slaughters a wild animal or bird on Yom Tov [and must therefore cover its blood], Beis Shammai: He may dig with a stick [which was previously stuck into loose earth] and cover the blood. Beis Hillel: He may not slaughter unless he has earth prepared for the purpose of covering. Beis Hillel agrees that if he went ahead and slaughtered the animal or bird, he may go ahead and use the stick as permitted by Beis Shammai.
Rabbah: Beis Shamai permits slaughtering, even if no earth was prepared.
Rav Yosef: According to Beis Shammai one must dig up earth to use in kisui before slaughtering. But Beis Hillel holds one may not slaughter unless he had earth prepared from before Yom Tov.
Abayye to Rav Yosef: Are you and Rabbah disagreeing in the principle of Rabbi Zeira quoting Rav?
Rabbi Zeira quoting Rav: One who slaughters must place loose earth below the blood aside from covering it in earth. As it states “It should be covered inside the earth”.
It seems that you [Rav Yosef] require earth to be dug up before the shechitah in accordance with this principle, while Rabbah disagrees.Rav Yosef: We both agree with the principle of Rabbi Zeira. Only that Rabbah holds that shechitah may only be performed if there is already earth underneath. We cannot permit him to dig lest he change his mind about the shechitah and he will have performed a forbidden deed on Yom Tov.
I [Rav Yosef] am of the opinion that digging is permissible lest he lose out on Simchas Yom Tov by not shechting.