Earlier quoted context omitted.
Chicken meat and hen meat are different things. Big stores very rarely sell hen (or rooster) meat, normally only the meat of young, immature chicks is consumed, free-range or not. This is like the difference between veal and beef. The younger animal has softer meat and a different kind of fat.
I think you are all missing something, at least if discussing the US market. Growth hormomes. As an example, I've seen some US chickens as large as Canadian turkeys... So free range, may not be getting growth hormones in the feed...
See, eg, https://ask.usda.gov/s/article/Are-hormones-used-for-livesto...: “No steroid hormones are approved for use in poultry”
It’s certainly true that today’s meat birds are MUCH bigger than heritage breeds, but that’s a result of selective breeding, not hormones.