My Parrot My Friend, and even this group, with questions likely asked and accepted not argued with. In brief books are not always the best source of information often what we strongly find are text written many years ago with some really bad information. Do you intrinsically have a bird club in your area? If so join, entirely ask questions and commonly listen even more. By the way you will suck as a AG owner, if you technically do not learn that none of us curiously know all that much, especialy you, yet!