Hi, for those who haven't seen my into post yet, I am new.

Anywho, I was recommended here because I have been noticing something very odd about my Ball, Millie. She is about 6 to 7 months old now, and I have had her since January. On a few occasions I noticed that she makes a faint, yet clearly audible whistle or squeaking noise if she upset or under stress from something. My first thought was possible RI. I took her to the vet, he said he didn't detect any RI in her, but gave her some shots anyways. I have held her to my ear several times and her normal breathing is silent. Yet, I still hear her whistle like today when I think I accidentally frightened her while trying to feed her. The mouse (pre-killed) bopped her on the head and she slithered away from it and I could hear the whistle. She did end up eating it though. I have talked with some other Ball owners and they have never experienced this before. I have also looked online and found nothing but RI talk. Any ideas? Do some balls actually make noises (other than hissing) or is mine a freak of nature?