What is the source line at the end representing there? I've read The Restaurant at the End of the Universe, and while it definitely contains (and I see it as a major cultural anchor for) animals bred to desire being eaten and be able to say so, it doesn't contain that particular scene (at least in the version I read). Is that line Baggini noting that his scene was inspired by the Adams book?

Baggini is the source of the quote he just references the concept was from Adams at the end. I copy/pasted this from the book.