REVACH L'DAF
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SUMMARY
1. Ameimar maintains that the first batch of eggs that a hen lays after becoming a Tereifah is forbidden.
2. Rav Acha maintains that when an animal that is a Tereifah conceives and gives birth, according to Rebbi Yehoshua the offspring is Kosher and may even be brought as a Korban. Rebbi Eliezer disagrees.
3. Ravina maintains that a Tereifah cannot conceive and give birth. The disagreement between Rebbi Yehoshua and Rebbi Eliezer applies in a case in which the animal conceived prior to becoming a Tereifah.
4. Rebbi Yehoshua agrees with Rebbi Eliezer that an egg hatched from a hen that is a Tereifah is forbidden.
5. Rav Huna maintains that a creature that does not have bones cannot live for twelve months.
6. An animal that is missing a leg, or has an extra leg, is considered to have a Mum.
7. An animal that has an extra cecum is a Tereifah, because having an extra organ is equal to missing an organ.
8. An animal that has a tube of flesh from the reticulum to the omasum is Kosher, but if the tube is from the reticulum to the paunch it is a Tereifah.
9. If an animal has two sets of intestines, it is a Tereifah, but a bird with two sets of intestines is Kosher.
10. If the down if a bird is removed, it is a Tereifah, according to Rebbi Yehudah.
11. If an animal turned red because of a sudden surge of its blood, inhaled smoke, caught a cold, ate chicken dung, or drank bad water, it is Kosher.
12. If an animal ate poison, or was bitten by a snake or a mad dog, it is not a Tereifah, but it may not be eaten because of the danger posed by eating its meat.
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A BIT MORE
1. The eggs had already begun to form in the hen at the time that it became a Tereifah. Ameimar maintains that a fetus (or an egg) is part of the mother no less than any other part of its body, such as the thigh. Therefore, when the mother becomes a Tereifah, the developing eggs become a Tereifah along with it.
2. According to Rav Acha, the disagreement between Rebbi Yehoshua and Rebbi Eliezer is whether Zeh v'Zeh Gorem is permitted. According to Rebbi Eliezer, both the mother, which is a Tereifah, and the father, which is not a Tereifah, are responsible for bringing the offspring into the world, and thus the offspring is prohibited as a Tereifah. According to Rebbi Yehoshua, since one of the parents is not a Tereifah, the offspring is permitted.
3. According to Ravina, the disagreement between Rebbi Yehoshua and Rebbi Eliezer is whether the fetus is considered part of the mother's body. According to Rebbi Yehoshua, it is not considered part of the mother's body, and therefore if the mother becomes a Tereifah the offspring is permitted. According to Rebbi Eliezer, the fetus is part of the mother's body, and when the mother becomes a Tereifah the offspring in its womb becomes a Tereifah along with it.
4. According to Rav Acha, the egg is forbidden in a case in which the hen was fertilized by warming itself on the ground. Therefore, regardless of when the egg was fertilized, it is forbidden even according to Rebbi Yehoshua, because it is not Zeh v'Zeh Gorem; the mother is solely responsible for the fertilization of the egg. Since the mother is a Tereifah, the egg is a Tereifah as well. According to Ravina, even if the hen was fertilized by a male and subsequently the hen became a Tereifah, the eggs are forbidden even according to Rebbi Yehoshua, because an egg is attached to the mother more than the attachment of a fetus of an animal to its mother.
5. Consequently, if dates are infested with worms and we are uncertain about whether they were infested while still attached to the tree (in which a case the dates would be forbidden because the worms were Shoretz on the ground, since the tree is attached to the ground) or whether they became wormy after they were detached from the tree (in which case they would be permitted, because a worm that has not been Shoretz on the ground is not forbidden as a Sheretz), after twelve months the date is permitted. Had it been infested while it was attached to the tree, the worms would have already died.
6. Rav Huna maintains that missing a foreleg or having an extra foreleg is a Mum, and the animal may not be offered as a Korban, but it is not a Tereifah. However, if it is missing a hind leg or has an extra hind leg, it is a Tereifah.
7. However, if the two cecum are connected in such a way that the contents move from one to the other, it is considered to be one large cecum and the animal is Kosher.
8. The tube of flesh to the paunch is extra flesh, and anything extra is considered as though it is missing. Accordingly, it is like a portion of the digestive tract is missing, and the animal is a Tereifah.
9. However if the two sets of intestines of the animal are adjacent to each other and their separation is within a finger width of each other it is Kosher. However, there is a disagreement between Rav Ami and Rav Asi whether the two intestines must unite into one tube for it to be Kosher.
10. According to Rebbi Yehudah, the down of a bird is like the skin of an animal. An animal that has its skin removed is a Tereifah.
11. Shmuel maintains that if an animal ate the grain of a Chiltis, it becomes a Tereifah, because the grain of a Chiltis is very sharp and it punctures the digestive tract. However, if it eats the leaf of a Chiltis, it is Kosher.
12. Since the animal was poisoned, its meat is dangerous to humans. However, if the animal ate a type of poison which is dangerous to animals but not to humans, the meat may be consumed.
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