how severe is the "wheezing"? and is that the only symptom you're seeing? are you seeing any mucous in the mouth or bubbles coming from the nose? difficulty breathing or open mouth breathing? have you had him for a while with no "wheezing" and then he started or did you notice it soon after you got him? if you're not seeing any other symptoms and he's still eating for you fine he might just be a noisy breather. just because you can hear the snake breathe sometimes does not necessarily mean it's sick.