Layna with some rescues you'll be easily past 90 days just getting them back in decent enough shape to adopt out anyways. I'm not sure what big rescues do about their QT time.

We've always made it a policy that if a new snake comes into the QT area (a corner of our master bedroom), any snake there has to restart their QT clock. So basically if a snake is already there and is on day 42 of QT when a new snake arrives in, that first snake drops back to day 1. That's just how we do it, I'm sure big rescues with many creatures coming in must have some sort of way to manage it better. Since we don't have a lot of snakes coming and going, it's always worked for us though this way.