I remember having read (at least I think I've been reading, it might have been a series but I'm almost positive it was in prose) a book or story where an animal, maybe genetically engineered? basically advertised itself to be eaten.
Something along the lines:
"Have you considered this piece of me? Very tasty, I insist you try it."
Now it's a washed out memory so the strongest associations to it are the obvious ridicule of the situation and the protagonist being, as far as I remember it, weirded out / confused / speechless at the situation.
I realize this might be a long-shot but I can't get it out of my head.