You might want to ask Lara Joseph! I really love the post she did today helping out a woman that wrote her about her trouble with her young macaw. Anyone that has even glanced at any of my other posts knows that I could go on and on and on and on for ages about behavior and training. I know you just read that sentence and changed the word "behavior" to "absolutely anything in the world" but that is not true! Besides which, I am talking about behavior now, and will not be going on and on, since I think Lara said it all perfectly. And if you have a parrot, or are thinking about getting a parrot, or have had multiple parrots for many many years, I highly recommend you head over to Lara's blog and read not just today's incredible post, but also the rest of her blog!
And just in case you somehow missed all the links I peppered that short paragraph with, I will give you one more chance to get there- larajoseph.wordpress.com