So I have this friend. This friend has a pewter that wheezes also. It's totally healthy. I think it's completely reasonable to say that since there is a known issue where the super versions die in the egg, hatch with cleft lips, duckbills, etc. that the single gene version may have some kind of minute snout issues that don't affect the overall health of the animal but might occasionally make whistling or other sounds when the animal breathes hard due to stress of handling or feeding.
I know Kevin McCurley doesn't work with Super Cinnamon because 'he has bad luck with duckbilling and lip problems.' Perhaps this issue only affects certain lines? Either way, posting 'my animals are all healthy' isn't really adding value to the thread. It's a known issue... we shouldn't pretend it doesn't exist just because we don't have animals exhibiting the problem ourselves.