I have a budgie (Apollo) who I've had for about 6 months and he is the most shy bird I have ever known. My birds are free to fly around my room (don't worry its nice and safe for them) but Apollo very very rarely leaves his cage even when his buddy Tiki does. Tiki is the most playful energetic and adventurous budgie ive ever had. Tiki is starting to get the hang of being hand tamed but all of my efforts with Apollo have been futile. He won't let anyone come near him without completely freaking out. I feel so bad for him because I want him to have fun and play with Tiki but he just seems so anxious and scared all of the time. What can I do to help him?