Earlier quoted context omitted.
We can just stop breeding chickens for the slaughter?
Is it better to have lived and die, or not live at all?
If we admit the idea that some lives can have negative value for example if they consist solely of suffering it would be OK to breed kid burgers so long as they had a pleasant existence up until slaughter at 7 followed by a quick trip to McKid.
I suspect that my moral philosophy and likely yours is simply insufficient to deal with hypothetical persons and we ought to simply reason about how to treat actual beings that exist.