That includes chicks with hens or in brooders, the flying is all based upon the development of the chick. The mother will teach them things, but she can't teach them anything until they are ready, and them being ready depends upon their development. Flying tends to be a characteristic that is encoded into the genetics, chicks who have never had a mother or been taught even by a human will learn how to roost/fly because it is instinct; they're not like wild birds where she shoves them out of a nest to see if they will or not. The mother just helps teach them other things, possibly more quickly, which can vary among mothers (some hens are horrible, some are decent, some are excellent).what about chicks with hens
American games generally speaking are very similar to the Junglefowl, except they are not quite as flighty (I've had Junglefowl from Ideal to compare, they were the only birds that truly were too flighty for me to be able to want to keep) and they are a lot bigger (about twice the size nearly).Don't know about American games, but for the latter, in my observation, the chicks could fly very well at 1 week. As DTchickens mentioned, I'm sure they could start flying earlier but it's just that they can't stay in the air long due to the developing flight feathers.
I'll say this, even when crossed with domesticated breeds down to at least 1/16th Junglefowl blood you will still not be able to get within 10-20 feet of the birds before they run off into the woods. If you catch them, imagine a bird screaming it's head off whilst also flapping it's wings and trying it's hardest to get away from you at any chance it thinks it gets. How far can they fly? Not entirely sure, chickens being ground animals typically and not song-birds usually won't fly further than about 50-60 feet before they land again and run away somewhere.oh and how flighty where the jungle fowl and where did u get them and what would u feed them and how far would they fly