Previously, I've adopted adult chickens. I've got 2 young girls (9wks, 12wks) and I suspect that I've still got the opportunity to imprint some behaviours on them and make sure they grow up "well-adjusted". I've only had them a couple of days, I'm just trying to get them used to me and not to freak out when I go near them. They seem quite tame and don't take too long to come out and have some food with me there and tolerate my presence. I can pick them up if I am able to grab them (they won't walk up to me and let me pick them up).
Are there other things I should be trying to train them to do/tolerate/accept? At the moment, they are confined to their house/run. I haven't let them roam about in the bigger run, I'll give them some more time to settle in and then let them look around. Up to what age can they learn things and when are they "fully-formed adults"?