Study Chullin folio 42A with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
The Talmud answers: Lest you say: If it is so that his wife gave birth, it would have generated publicity and been common knowledge; therefore, one might conclude that the slaughter is valid even if he declared that the slaughter is for the sake of the burnt offering of his wife after childbirth, as
Mishnah: These wounds constitute tereifot in an animal, rendering them prohibited for consumption: A perforated gullet, where the perforation goes through the wall of the gullet, or a cut windpipe. If the membrane of the brain was perforated, or if the heart was perforated to its chamber; if t
Additionally, a lung that was perforated or that was missing a piece renders the animal a tereifa. R' Shimon says: It is not a tereifa unless it is perforated through to the bronchi. If the abomasum was perforated, or the gallbladder was perforated, or the small intestines were perforated, it i
Likewise, if an animal fell from the roof, or if the majority of its ribs were fractured, or if it was clawed by a wolf, it is a tereifa. R' Yehuda says: If it was clawed by a wolf in the case of a small animal, i.e., a sheep or goat; or clawed by a lion in the case of a large animal, i.e., cattl