My budgie, Milk Shake, has been puffed up and listless. She will eat and drink, chirp a little but otherwise just wants to sleep. Her abdomen seems a bit swollen. I gave her some Oasis Alive and Well Pro-biotic for Birds and she perked up but what she really loves is charcoal. I read about it used as a help for infections. If I put it in the feeder she runs over immediately nibbles it up. I live two hours from the nearest avian vet and have been putting off traveling that far. Any advice?