Wyowoman, actually tripe is from the stomachs of cattle or other ruminants (probably 99% of the time cattle). Since pigs aren't ruminants, their stomachs don't have the proper texture. That said, menudo is another wonderful dish that's a heart attack waiting to happen. The best usually has a thick layer of cholesterol laden liquid fat which rises to the top of your bowl. I probably get a bowl about once every ten years, and it's heaven!