Scheduling a vet appointment in the morning and the BP in question is already in quarantine. Just looking for opinions/ideas. I noticed one of our "new" snakes (a rescue with a broken back that had just been moved out of quarantine 2 weeks ago) let out a very loud whistle when I picked him up to put him back in his cage. He is exhibiting no other symptoms of an RI. I took notice a) because of the whistle but b) because Sunday during feed there was a prolonged whistling, very low like air releasing, that I had assumed at the time to be from the rat. Hot spot is 90 ambient 80s - will dip to upper 70s on particularly cold nights. Humidity stays around 50 - 60. Bit on the low side. The noise got worse and more frequent as he was handled. Been watching him for an hour or so. Aside from one episode of loud whistling after he was placed in quarantine tank there have been no other noises. No foam/bubbles no head rubbing or elevating his head. Behaving pretty normally. Thoughts - RI or stress induced noise or???