Responsa for Chullin 17:31

טרפה ואסורה באכילה

On what principle do they differ? - On the principle laid down by R'Huna, who said: An animal while alive is presumed to be forbidden<span class="x" onmousemove="('comment',' Since it is not permitted to eat a limb or flesh cut off from a living animal. This being so, the animal retains its status of being forbidden food until we have definite proof that it has been properly slaughtered. Once, however, we know that an animal has been ritually slaughtered the presumption that it is permitted food will not be rebutted without proof that some internal defect has made it trefah.');">¹⁶</span>

Shut min haShamayim