Chulin3: 3
וְאֵלּוּ טְרֵפוֹת בָּעוֹף: נְקוּבַת הַוֵּשֶׁט, פְּסוּקַת הַגַּרְגֶּרֶת, הִכַּתָּה חֻלְדָּה עַל־רֹאשָׁהּ מְקוֹם שֶׁעוֹשֶׂה אוֹתָהּ טְרֵפָה, נִקַּב הַקֻּרְקְבָן, נִקְּבוּ הַדַּקִּין. נָפְלָה לָאוּר וְנֶחְמְרוּ בְנֵי מֵעֶיהָ: אִם יְרֻקִּים, פְּסוּלִין; אִם אֲדֻמִּים, כְּשֵׁרִים. דְּרָסָהּ וּטְרָפָהּ בַּכֹּתֶל, אוֹ שֶׁרִצְּצַתָּה בְהֵמָה וּמְפַרְכֶּסֶת, וְשָׁהֲתָה מֵעֵת לְעֵת וּשְׁחָטָהּ, כְּשֵׁרָה.
And these are accounted treifah in fowl: [A fowl] whose esophagus is punctured, [or] whose trachea is severed, [if] a weasel struck it on the head in a place where it renders it treifah, [if] the gizzard was punctured, [if] the intestines were punctured. [If] it fell into a fire and its internal organs were scorched: If they turned green, they are unfit; if they are red, they are fit. [If] one trod on it or knocked it against a wall, or [if] an animal crushed it and it flutters, and it remained alive for twenty-four hours and he slaughtered it, it is fit.