Species: cut-throat finch (male)
Problem: coughing-like fits
Just to be clear, I've already been to the vet twice now. The finch in question is getting medical care. Just wanted to toss this up here. See what you all think.

A week ago one of my cut throat finches started making an odd coughing noise. I've never witnessed a bird cough or sneeze so I wasn't sure what it was, but I figured it wasn't good. The internet was telling me URI or air sac mites, so I took him to the vet as soon as possible, which was the next day. An examination of him as well as his general over all good-looking condition led the vet to think it wasn't mites. So I took him home to observe him... Aside from one more coughing fit in those days, nothing. After days of no symptoms, I decided to reunite him with his girlfriend today. Not 2 hours later, the symptoms started again and seemed worse. I recorded the behavior, the cough-like fits, and made a vet appointment for that day. Today.
I showed the vet the video. That along with the fact that he only seemed to be doing it while in the "finch room" (he seemed to be in perfect health whem he was isolated in the other room) led her to think it might be behavioral. That he might be regurgitating for his mate to ahow her he was a suitable parent (as apparently some birds do). However, when the vet saw the behavior in the office, she got another vet involved and they collectively decided a few things (with tests and examination):
1. This is likely not air sac mites, though they gave him medication for it, because of my worry. They saw nothing and have done 2 examinations on him now for it, a week apart.
2. His coughing-fits were always the same. Same number of coughs, same pattern.
3. His bacterial swab showed nothing abnormal.
They actually think it may be neutological. He's on metacam and enro. Basically they weren't sure what it was so they're giving him the works. It worried me that neither vet, both of which are highly good at what they do and great with birds, had no idea what this was. Anyone had similar experiences? I may try to upload the video tomorrow.