Unpopular opinion, when any bird is over the age of three months,I personally think it’s “almost “impossible to get a truly untamed chicken out of its way,whether it’s extremely skittish or just down right aggressive.However I’m not saying it’s completely impossible as I’ve attempted to rehabilitate to pullets that I pick up from sales.The closet I get,is to them coming when called and occasionally to walk a few feet past me, and that took up to about three weeks, and it was only successful to one.On occasion I have had super flighty birds just wake up one day an decide to warm up to me, that was a one time thing.
Best advice I can give is be patient, something I can’t do.If the bird doesn’t come friendly or I didn’t raise it as a chick,I don’t waste my time taming it, it’ll just be for egg purposes.I would offer treats and get them use to being around your area and space before trying anything else,and once your successful with that you may try hand feeding.And then just slowly try petting the birds and then picking them up,Basically baby steps.Honestly if I were you,I woulda just got baby chicks.
If the birds were originally friendly,that typically just means they need time to warm up to their new owner, my birds would actually run from strangers.