There are probably some somewhere, but yeah not many. However the ones that are bred for food typically weigh more.

Hell, if you let a meat chicken grow beyond its sell-by date, there’s a good chance it will develop so much muscle mass it cannot stand up anymore, and it will rot to death on the spot.

I’m pretty sure they were domesticated from something (a South Asian jungle fowl, I believe) to the extent that they are no longer even the same species. So any “wild” chickens would just be feral escapees.