i let my chickens out to free-range when they where 2 weeks but not for the night just for supervised times. but i did not let mine out full time till they where 7 weeks old.
i have a chicken and when i got her she was very scared of me now that i have had her for about 4 months and have been holding her and giving her treats a lot now she is much more friendly but not as friendly as my other chickens witch i have had since day one.