I may have lost the object of that sentence. Just to be clear: our vegetarian friend ate a pig fetus from a pregnant pig that was removed from a gigantic snake's gut by hunter and gatherers who were nearly starving to death. Our friend was also starving, and was, temporarily, not a vegetarian.
Here, for example, is an anaconda (?) regurgitating a tapir (?) after being harassed.
To be fair, this snake may have previously eaten humans. I'm just sayin' ...