How are the Manpigs made?

[Alardem]

I didn't think that people volunteered... Didn't he...

Spoiler below!

kidnap people (primarily orphans) to use as manpigs?

Yes. Thats true. I dont think they are orphans. Even if they behave like children the manpigs are too huge for being kids.
But yes he built many traps and caught many people with it.

But he mainly used the children to clean his factory whatsoever. And then he fed then to the pigs...
Mandus is a badass :o

"Badass"? More like cartoonishly evil.

It's implied that he gathers his test subjects from poor people who attend the church, and from the asylums. He feeds rich people and meddlesome orphans to the Man-Pigs.