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It is permissible to compare puncture holes in the intestines, lung, or trachea of an animal to determine if the puncture occurred before or after Shechitah.
If the rectum of an animal is punctured, the animal is Kosher because the hips seal off the puncture.
If the inner paunch of an animal is punctured, the animal is a Tereifah.
If the majority of the outer paunch of an animal is torn the length of a Tefach, the animal is a Tereifah, according to the Tana Kama. According to Rebbi Yehudah, if it is a large animal even if it is ripped only a Tefach it is a Tereifah.
If the tear in the paunch created a circular hole larger than the size of a Sela, the animal is a Tereifah, because if the hole would be stretched out in a straight line it would be the size of a Tefach.
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