At this point wouldn’t it be easier to artificially select for traits that make the chicken mind more tolerant of poor conditions? Like if we can have consciousless chicken then it wouldn’t matter the condition they grow under?
It sounds way easier, to continue to pretend, that animals don't have feelings. And in general not know too much of the meat factories. Which is why many people choose this approach.
Also like the sibling comment said, not really possible with our tech and knowledge. Lab grown meat would be the way to go to achieve it.
That is one heck of a story. Salient to discussion about consciousness: to what extent does the ability to act like awareness, count as awareness for the purposes of outside observers?
You would need a clearer working model of consciousnes to be able to know whether your efforts were succeeding. But this is the idea behind lab-grown meat, just don't grow the brain at all and you don't have to worry as much.