I would not force her to molt, I like to keep it natural. No offense, I feel that forcing a molt is like forcing you to eat something after you just ate. I think this should not be a option.
This is her face. And my rooster. The barred rock is my boy named Stubby, lol, Stubs for short. The Cornish rock is my girl named North Star, aka Pancake.
We need a pic of the problem area.
My guess is it's just a Cornish X. Lucky to still be alive. They don't grow the same as other chickens. They also sit around by the feeder. I now raise mostly Dark Cornish so I can butcher when I please not by 8 weeks of age.
Still saying it's just a normal Cornish X without having any good pics.
I agree with Ol' Grey Mare. That's not much to worry about. Butchering is the only thing they are breed for. Doesn't mean you can't keep them just that's what they're breed for.