Chulin 2:5-6

Chulin 2:5

If a person slaughtered a domesticated animal, a wild animal or a bird and no blood came out, the slaughter is valid and the meat may be eaten with ritually-unwashed hands because it was not rendered susceptible to impurity by blood. Rabbi Shimon disagrees, saying that it became susceptible to ritual impurity through the act of slaughter.

Chulin 2:6

Let’s say that a person slaughtered a seriously ill animal. Rabbi Shimon ben Gamliel says it may not be eaten unless the animal jerked one of its front and hind legs (so that we know that it died from the slaughter rather than from its illness); Rabbi Eliezer says it is sufficient that the blood spurts (which would also indicate that the animal was still alive). Rabbi Shimon said that the slaughter is valid even if the animal was slaughtered in the dark and the person found the sides of the animal's wound full of blood in the morning because we see that the blood spurted, as per Rabbi Eliezer. The Sages maintain that the animal must jerk a front or a hind leg, or move its tail; this is true for both small and large species. If a dangerously-ill animal of a small species (e.g., sheep or goats) stretched out a front leg but did not draw it back, the slaughter is invalid because this was a sign of the animal dying (of its illness). This is only the case when we have a presumption that an animal is dying; if we have a presumption that it is healthy then the slaughter is valid even without of these signs.