Hi,
Is she shedding or getting ready to?
If you hold her up to your ear is the popping coming from her nose or further down her body.
Do you hear it only when you are handling her and she is breathing faster or heavier or even when she is sitting at rest?
If you open her mouth is there a lot of frothy mucus at the back of her throat? Does it look slightly redder than the rest of her mouth? How about at the end of the beathing tube at the bottom of her mouth?
Is there any sign of mucus in her waterbowl or smeared on cage furniture?
dr del