I'm trying to help my mother find a short story that she remembers reading some, oh, 30 or more years ago.
I don't have a lot to go on, but apparently the main concept of the story was that the food that everyone was eating was said to come from “The Giant Chicken” or “The Great Chicken” kept somewhere (she read it in a Hebrew translation), but when the protagonists delve into the matter, they discover that this “chicken” (as it was translated) is actually a giant cancerous tumor, kept alive and growing for food.
I've established, probably, that this is not Harry Harrison's Make Room! Make Room! or Roommates, the basis for Soylent Green. That was my first thought. I also couldn't find a lead in the In Vitro Meat In Fiction section on wikipedia.
I don't know any more - not what the main characters were, what book it was published in or the actual decade it was written, unfortunately. It would have been read in the early 80's at the very latest.