Not exactly what you asked for, but Alastair Reynolds have books with "hyperpigs" that are part-pig, part-human, likely bred to be replacement parts for humans.
I've been reading his novels, and I like the story of the pigs.
Genetically tweaked to be more compatible with the humans that might harvest their organs, but then they became a bit too human. Then scientists were like fuck it how far can we go with this. Hyperpigs.
Scorpio is not as interesting a character as I would like, but he's a good pig.
