Wheezing

My 2 year old Royal has been wheezing once or twice a night lately. She's been to the vet recently and took a culture... Came back fine with no sign of RI. Her mouth is clear and so are her nostrils. But I hear her wheeze at night incredibly loudly. Like a loud hiss. Idk what it could be or if I should be worried anymore. It makes my heart lurch every time I hear it.


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I am a new owner not an expert but I thought I heard the same from one of mine and didn't see any signs as well. I added a small kids humidifier to the room for a day. Haven't heard anything since and that was a week ago.

did she recently shed or is she about to shed? this is another cause of the wheezing noises sometimes, if you had a culture done then I would say this is most likely the issue.