I have a problem with my female red-eared waxbill. About a month or so ago, she went into some sort of illness or sickness. She was lethargic, could hardly fly to the branches, didn't seem to eat, or preen her mate or do her regular activities. Her vent was clean, poops were normal, not sneezing or anything, but if I came near the cage, she wouldn't do her regular quick fly-and-hide routine, with the tail wagging, and instead would barely flutter across the floor of the aviary. Within 2 days, she was completely back to normal and has been for the last month.
Today, again I notice she's back again on the floor, very lethargic, fluttering around, and sitting puffed up, and very tired looking, poops are fine, not eating, not preening her mate, just sitting there.
Is it possible for finches to have epilepsy? Could she just be recovering from a seizure?
Also are waxbills prone to air sac mites too? I have the medicine to treat all the birds for ASM but I'm waiting till the breeding goulds fledge their young, before I do everyone. (and I might be slightly afraid of doing it myself!

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