Sorry guys, I might look like I'm not taking good care of my 'tiel, but I am seriously trying to make every effort to make him comfortable. But after taking all of your replies and comments into consideration, and then into action, Koki still has not made any progress. In fact, he might even have taken a step into the wrong direction. Now he has started screaming (I think that's it, because it's really loud and high pitched), whenever I'm not close to his cage. He will take millet from my hand, and absolutely refuses to eat fruits, even if that's the only thing in his food bowl. He'll just wait before bedtime when I put seeds in, so I gave up after a week of trying with no success. Also, I've tried to scratch his beak by holding a small piece of millet between my middle finger and thumb, then when he puts his head in to eat it, I gently scratch his beak. I don't know if he enjoys it, because if I put my hand in the cage without any treat, he will back away and go to the highest perch. I've also put him in a seperate cage now - away from the budgies -, and I believe he likes the relocation. He also plays aggressively with his toys (usually when he starts "screaming"), and I don't know what's happening to him. I'm not exactly sure of his age, but I got him just weaned, most likely parent fed, from a pet store, and I have had him for a little more than a month now. I have also tried sitting next to his cage and talking to him, and I think he's used to my voice now, because he doesn't mind my face being right next to his cage now. Please any help would be greatly appreciated, and once again, I'm genuinely trying my best to make him feel happy. Thanks!