Have you ever seen how chickens are raised for mass-scale meat production? I used to catch the bus across the street from a chicken-processing plant. They live

Have you ever seen how chickens are raised for mass-scale meat production? I used to catch the bus across the street from a chicken-processing plant. They live in cages that are just large enough for the chicken itself, and the cages are stacked quite high, so that except for the top level, all of them are constantly getting waste dumped on them by the chickens further up in the stack. Seems pretty torturous to me.