About a three days ago, I became the mother of a cockatiel. The cockatiel was recently abused and turned a bit mean, which is one of the reasons I adopted him. However, every night, he has been up chirping loudly in his cage all night. Now, this does not bother me because I am up all night any ways. But I am worried that he is not getting enough sleep. Does any one know why he will not sleep? I cover his cage up and have the lights off and everything.