Reference for Bekhorot 80:16
ר"ג אומר
then it is not a blemish, but if it is on account of the bone,<span class="x" onmousemove="('comment',' The animal opens its mouth well, but the jaws are tight and prevent it from opening the mouth wide enough. According to Rashi's second jur juhr explanation the meaning is: If the swelling is due to the air, (reading not) which it breathes, then it is not blemished and it will recover. But if it is because of the bone being unduly thick, it is a blemish.');"><sup>10</sup></span>
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