So, I take it that your calling me a liar. There's no use in arguing with stupidity. The Lord feeds the birds just as the Bible says...
No, as
@3KillerBs correctly notes, Gallus Gallus Domesticus (that is, the common chicken) is a domesticated species - while there are a few climates where feral flocks are capable of exceeding predator pressures and maintaining stable populations, most climates do not. Asking where you are located is a way of establishing the base assumptions.
Raising chickens in Montana is markedly different than raising chickens in England, in Florida, or in New Mexico. Many of the heritage "dual purpose" chickens, you will likely note, are named for areas they were developed, well north of the equatorial tropics and subtropics where gamebirds can (and have) thrived for centuries.
The Delaware, Rhode Island Red, New Hampshire, Buckeye, Hamburg, Jaerhorn, Jersey Giant, Orpinton, Plymouth Rock, etc all bear evidence to that.
If set free in their native environments, none would be expected to thrive.
Otoh, many of the more ancient breeds - scrawny, flighty birds infrequently laying small eggs - do maintain feral populations in the Mediterranean, the Carribean, South FL, Hawaii, and similar climates - though if set free in Montana or Norway, they likely wouldn't do so well...
I assure you, if the members of BYC intended to call you a liar, most would be far more direct about it.
/edit and as an aside, given the choice between taking animal husbandry advice from the most published book in Western History and a more modern scientific work devoted to the subject of animal husbandry, I'm going to choose the science over magical thinking. That a thing is Popular is no guarantee of its Accuracy.