One of my ameracaunas has a sack filled with fluid above her eye. It doesn't seem to bother her and she seems okay but this just came up about 1 week ago. She's 2 years old. Any idea what it is? I can't find anything anywhere. It looks like an inflated part of her comb, but it's not - it's just the same skin type - sort of red like the comb. Any ideas/suggestions/input will be appreciated.