I agree that most commercial chicken operators are trying to do the best they can for the chicken's health within the constraints of trying to make an economically viable product. And there is some unfair propaganda out there. Thanks for telling the other side of the story.
But, I would also say that the constraints of the business model still make it hard on the chickens. They are fed 24/7 for 5 or 6 weeks, until by the end, many can't walk. They are then loaded into cages and transported, in some cases, many miles over freeways, until they reach a processing center, where not all meet a swift and humane end.
Personally, my decision to stop buying supermarket chicken was made when I passed a chicken transport truck on the freeway. It was a hot day. I could see the chickens crammed into cages, bodies pressed tightly against the wires, feathers being blown off. I've since read some of Temple Grandin's work about commercial meat and egg production.
I don't begrudge anyone who buys commercially raised chicken. Life isn't perfect, and people need to eat. I realize how fortunate I am that I have the means to raise and butcher my own. But there is no question that my chickens had a better life and less traumatic end that commercially raised poultry. As long as I can raise my own, I will.