Hello. I am having behavior issues with my (1 year on May 10) 'tiel, Chester. He is EXTREMELY jumpy and skiddish all the time and when I go to take him out of the cage he runs away and spazzes out. He has also begun to screech constantly even when he is out of the cage. When I finally get him to come out of the cage he is very mean, he bites (hard enough to break the skin) and lunges and hisses and flies all over the place. I don't know what happened to him either, he used to be a sweet cuddly little birdie that couldn't stand to be anywhere but my shoulder. I simply don't know what to do and I hate taking out only one of my cockatiels all the time and leaving the other (Chester) in the cage. Any advice on what could be the issue and how to solve it? I don't want to even consider giving him up (back to the breeder) but that is what others have tried to tell me to do PLEASE HELP!