http://www.tailfeathersnetwork.com/b...sittacosis.php
This site tells you about a few of the test available. I don't think that Skye will be lonely as an only bird. We have a parakeet that has a cage with plenty of toys and a mirrow and even comes out to fly around once in a while. He seems happy. He will even sing himself to sleep at night. When it comes to birds that is like a cat purring when they are happy. I would try to get her tested before bringing any other birds into the house. Just curious how did you have Fiona before she died? If it was a few years then Sky may be ok and free of it. Good luck.