@Grivusangel -- Tell me about it. Our neighbors (in the apartment) had a cockatoo -- seems like it was a rose breasted -- and even though they spent a lot of time with it, it still screamed in the morning and at night. They said this was normal parrot behavior. It probably is, but it's not conducive to a peaceful night's sleep in an apartment complex!
The woman in the apartment used to bake something she called "birdy bread" for the bird, and it pretty much ate a lot of the same things they did. She cooked for the bird, too, because she said they were healthier when you did. I guess so, because the bird always looked very content, and he was very friendly, so maybe a really varied diet is the key to keeping them healthy and happy and free from feather-plucking issues.