Yeah, I think we all have panicked over that at least once! They do tend to whistle before a shed, and sometimes afterwards if they get a bit stuck in the nose. I also have a few snakes (for some reason all the Australian-native pythons) who whistle/puff when they're excited or curious, which scared me at first... but considering they've been doing that for like 4-6 years now, I'm guessing they aren't sick.![]()