Capture and eat the roosters. You could catch the hens and put them in coops with nest boxes. Just make sure to regularly (like 2 or 3 times per day) collect the eggs so the hens don’t go broody on you. They are very prone to do that! Of course, those little eggs make just as good omelets and...
I read and watched videos about the ferals in Hawaii. They are rather amazingly self-reliant, although they do mooch for hamburger buns and the like in fast food parking lots. They do look rather like the original jungle fowl, and the hens are very broody. I realize some view them as pests and...