You are correct there. I didn't know this before.
Fact of the matter is,
pigs can eat almost anything they
can chew. ... A pig's body is also quite up to the task of digesting almost every part of the
human body. They
can not only chew and digest
human flesh, they
can also readily digest
human bone without excreting a noticeable trace of it.
Of course, they can't quite chew the skulls and longer bones that humans have, but if our killer has enough determination, they can just break said bones into smaller, more chewable pieces. They also can't digest human hair and teeth, but it should be a simple matter to shave your victims' heads and pull out their teeth before chow time, right?
Fed to Pigs - TV Tropes.