A wonderful thing has happened today!
I have Gandalf for 2 weeks now, and we didn't bonded so well.
he wouldn't let me touch him without threatening to bite me, and rarely climbed on my shoulder.
today i was at work for 14 hours, when i came back, Gandalf started whistling and calling me, and just went crazy at the bottom of his cage.
when i opened the top of the cage, he immediately climbed out and set on my shoulder.
i can now scratch his head pet him on the back and everything, he wont try to bite me and even loves it!