Chullin 57 - June 26, 11 Tamuz

Conflicting traditions existed regarding Rav's ruling in the case of a dislocated femur in a bird. Ultimately, the analysis indicates that Rav permitted such a bird, except in regions where the prevailing custom was to forbid it. However, after presenting various differing opinions regarding this issue, which leaned primarily toward permissibility, the Gemara brings an incident demonstrating that the widespread, accepted custom was indeed to forbid this condition; consequently, the practical halakha is established to be stringent in accordance with this accepted communal custom. Rav Huna defines a treifa as an animal that cannot survive for more than twelve months. A contradiction is raised against this definition from a braita that brings three alternative opinions regarding what legally constitutes a treifa, none of which align with Rav Huna's position. This difficulty is resolved by explaining that Rav Huna follows a different Tanna, whose view is reflected in another braita stating that one must wait through the winter months to determine whether an animal can successfully recover from its specific ailment.