I used the search engine and read the past posts on this subject and I have asked in live chat, but the one thing I can't seem to find is the studies that showed the dangers of Too dust on a Macaws respiratory system. There are a lot of posts that say 'I heard...' 'I've always been told...' 'I read that...' and other such opinions, but there are no referrences, that I could find, as to where that info is coming from. confused If this is a big problem, there should have been some studies on it right? Can anyone please direct me to those studies? Thank you.