Vet is the best solution at this point. The good news is that it appears to be low and does not look to be spinal column related. Good luck and please keep us updated. The more stuff like this that we have documented, the better off we all are. The vets know a lot less than we like to think they do. They just do not have the data. I have a long story to tell on that front once my personal saga is complete. Something like this should be no problem for a half way competent exotics vet though.