My favorite girl Petunia has had a nasty looking vent and a swollen, drooping bottom for maybe two weeks and it's gotten worse. Today I caught her and felt the abdomen and examined the vent. I think she has a bad lice problem on her bottom as I saw nits on the feather bases. Her abdomen is swollen and feels just like a water balloon. She's been laying eggs just like normal and even layed one this morning. She's foraging and acting normal but her abdomen is very obviously abnormal. I cut off all the bottom end feathers as short as I could get them to make it easier to monitor and easier on her. I'm not sure what to do and would like a get some type of idea what it is before I try to drain her and possibly make things worse. Thanks!