Hissing?

[loonunit]

Are you sure it's coming from her nose? Maybe she's just passing gas?

Haha. No, those actually sounds like, you know, passing gas.

My black pastel male whistles when he's moving around a lot. For a while I worried he had an RI, but there wasn't any fluid, or any other signs of a problem.

...two years later, he's still healthy, and he still whistles. I think maybe he just has squashy nasal passageways. Maybe a low-level version of the super black pastel duck-billing?