And it's true that the chickens we eat are subjected to horrific lives. cramped in boxes smaller than a bureau drawer with other chicken and only enough room to peck each other and themselves bare. Farmers cut off their beaks as a matter of course to lessen the behaviour but they still pick and peck and are miserable to no end.
McDonald's has at least stopped getting eggs from non-humane chicken farmers after many years of pressure from PETA. Kentucky Fried Chicken has refused to make that change which is why the character "George" from friends stopped doing ads with them. I won't buy chicken anything.