[adamanteus]

Just a quick thought on respiratory infections.... These can frequently be caused (in captive reptiles) by foul or damp air, through having inadequate ventilation in the vivarium. I think that quite often ventilation is overlooked, or is at least low down on the priority list when people are building or buying vivs. I know that many of the store-bought vivs I've looked at are not properly ventilated. (In my view).

I'm not saying this is the cause of the problem with RedSided's snake. It's just an observation, and maybe something to consider next time we're building or buying snake accommodation.