He looked fine this morning, although I didn't take him out to check for bubbles/listen to his breathing. He was poking out of his hide, but his head wasn't lifted and he didn't look like he was having trouble breathing at all. I'll take him out when I get home today to see how he's doing. Are there any symptoms I am missing? I check for:
  • mucous/saliva in and around the nose and mouth area
  • bubbles in the mouth/nose area
  • lifting his head to breath/opening his mouth to breathe
  • wheezing noises (which he does make, although not consistently and only when he exhales)
  • lethargy (which he is not)
  • feeding (he is feeding fine, didn't refuse last week and wagged his tail at my mouse cage last night - he even struck at it even though it was empty)
  • husbandry (I mentioned in my OP, I think he is all set)

The only thing he is exhibiting is the wheezing/whistling noise.

I am concerned as well because I have another snake coming in this week and while she won't be in the same room, I still want to make sure everything is A-OK with Leopold