Parrot becoming unfriendly

Question
Hi, wondering if you can help me, I own a 1 year old hand reared Australian Major Mitchell (pink cockatoo) and he has trained up quite well. He talks a little 'Hello darling', 'Scratch cocky', 'Ta', dances and will take food in his claw. He will readily come to me from his perch and with the command 'Up!' will step up on to my hand. He does not bite, he is very gentle. He will sit on my knee in front of TV and loves me to stroke his crest and neck and chest with my hands.

However, 2 weeks ago I went away for the weekend and left him at home with my son (20 yrs old). On coming home the parrot now freaks out and appears terrified of me (my son certainly has not done anything sinister, only fed him). 'Mitch' will not step on to my hand and seems to be particularly afraid of my hands. If I continue to put my hand into the cage he flaps around inside his cage (clipped wings) and breaks feathers etc and almost injures himself. He is acting terrified. If I take a lot of time he will still take food from me in his claw. If I let him out of his cage to walk around the floor he avoids me. How do I get him back to his tamed self please ?
regards
Joy

Answer
Hello Joy and thank you for your post.
The major problem with your friend is that he is mad at you (and birds are known to hold grudges) for leaving him.  He feels that you've abandoned him, even though you are back.  One day is enough for a bird to feel abandoned, especially if you are with him all of the time and he is attatched to you.
Take your time with him and continue working with him.  Right now he's lost his trust in you, and you have to regain that trust that he had.  Do not chase him, make him come to you to avoid his hurting himself.  It's going to take some time, but he'll come around again.

Good luck and God Bless.
Dianna