Rif Beitza 4b {Beitza 8b continues; 9a}

4b

{Beitza 8b continues}
For if it were a doubt, the Sages would have troubled to cover its blood on Yom Tov in case of doubt, and will come to permit its fats. Therefore we do not cover its blood on Yom Tov at all. However, at evening, motzaei Yom Tov, we cover its blood since we did not cover it on Yom Tov; even though he covered it on a weekday, one will not come to say like this {that it is considered a chaya}.

Rabbi Chiyya {out gemara: Rabbi Zera} taught {a brayta}: They did not only say this regarding a koi, but even if he slaughtered a beheima {domesticated animal}, chaya {wild animal} and fowl and their bloods mingled with each other, it is forbidden to cover it on Yom Tov.

R' Yossi bar Avin {our gemara: Rabbi Yossi bar Yasina'a} said: They only taught this where we is not able to cover it with one spadeful {of dirt}, but if he is able to cover it with one spadeful, it is permitted.

Rabba said: If he slaughtered a fowl on erev Yom Tov {and now it is Yom Tov}, we do not cover it{s blood} on Yom Tov {since he can still eat the fowl and so there is no violation of simchat Yom Tov}. {Beitza 9a} If he made dough from erev Yom Tov, he may separate its challah from it on Yom Tov.

The father of Shmuel said: Even if he made dough from erev Yom Tov, he may not separate its challah from it on Yom Tov.

And the halacha is like the father of Shmuel. For we learn in perek mashilin {Beitza 36b}: and we do not raise up teruma and maaser on Yom Tov, and even to give them to a kohen on that day. And these words were where they were tevel the previous day, but produce which has become tevel now, such as dough to separate from it challah, we separate and give it to a kohen.

Mishna:
Bet Shammai say: We do not move the ladder from dove-cote to dove-cote, but we may lean it