I had a cockatiel, a Yellow Naped Amazon, a Citron Crested Cockatoo, an African Gray , a Blue & Gold macaw & a Rosebreasted cockatoo for over 10 years. I had spots on my lungs that I had to go in annually & have MRIs done on. I did have an aircleaner in the room with the birds. I cleaned the cages daily. I sold the birds when I got back with my ex-husband because he didn't like them. I filed for divorce years later anyway. The spots on my lungs didn't change over 5 years or so, so my Dr. stopped watching them. I had 4 dusty powder parrots, the cockatiel, the Citron, the Rosebreasted & the African Gray. At this point I will not get one or more of the powder dust parrots because I don't think that it is worth giving up my health for. It is a personal choice.