I remember reading online a short sci-fi piece where people keep their own generically engineered pigs for spare parts, and the main character develops an affec

I remember reading online a short sci-fi piece where people keep their own generically engineered pigs for spare parts, and the main character develops an affection for the animal (that is smart enough to almost talk). The story ends with him needing a transplant, and sitting in the mud with the pig, contemplating the choice he has before him. Edit: In a more 'realistic' scenario, capitalism would ensure we were more remote from the ethical consequences of our consumerism.