There aren't growth hormones in the chicken produced here that is sold to the public. I don't know about birds identified for pet food, etc.

And what is it with you guys and "chlorinated chicken?" The water has some chlorine in it and it evaporates after some time in the air. If chicken is rinsed with US water chances are there is some chlorine in it, but this isn't poultry dipped in pool chemicals. https://www.chickencheck.in/faq/chlorine-washed-chicken/.