Comment by munchler
Yes, I think the subjective value of life for chickens in a factory farm is negative, so the most ethical outcome would be to stop breeding them, at which point they would presumably go extinct.
I’m not a vegan myself, but I have several vegans in my life, and I believe this is a common viewpoint in the vegan community.
Chickens predate factory farming. Why would they stop existing without factory farming?