fatboy sun conure - sudden aggression

by lynn
(glendale, ky)

I have had my sun conure for appox. 10 years, It has always been very nice. I let it out to fly around house & play. I have a huge bird cage for it. Lots of toys & treats. It has adapted well to grandkids which are now 7 years old. They treat (fatboy) very nice. Fatboy is kept in the formal livingroom in front of a big window and loves it. I did not want to put fatboy in a secluded area. MY problem is last week I let him out to fly around the house, and fatboy started attack me, I thought that was bad, he then attacked my grandchild, he had never done this before, he sits on my shoulder, plays. I am totally shocked and he has not improved I put him a new toy in his cage and he attacked my hand and tried to bite me. He is acting very aggressive. I don't no what has happended. Any suggestions???

thanks lynn