Hi have a new budgie, and an old budgie. The boy is very hostile, his cere is very swollen. He also is very aggressive. His mate died, and since then he is very lonely. I brought her home today and gave her her own cage. He is acting very weird. Like he is flying towards my head. I just took his mirrors out of his cage, because I think this is why his cere is swollen, and then he started dive bombing me! help! any advice?