First of all, I would like to thank you for your sincere and kind answers. It really means the world to me.
I will definitely try the eucalyptus method and update you.
Now, I want to answer some of the questions asked:
1. Her droppings look normal and by that I mean they are mostly solid, greenish with some white around and sometimes just a little watery.
2. She has never had a great appetite but never lost it, either. However, she doesn't drink much-- a few sips now and then.
3. There's no noise in her breathing and it is not slow but not very fast either.
@birding: She does this tail movement 95 % of the time.
@mascare rabbit: No, she is not lethargic at all. She sometimes does funny things in her cage like jumping from one side to the other or rolling over the perch. Actually, she almost never sleeps during the day, which is another worry for me.
@jwknight: The video was taken when she was idle for some time.
@penzance: She sometimes freaks out and makes a cry & scream like sound out of nothing (even when nobody is around) and flies for a few secs.
Limon and I thank you so much