Hey I got a new boa and she looks good(maybe a little skinny but I am comparing to my BP lol) but I noticed a little crack type sound a couple times while she was breathing. It wasn't very often like twice while I held her for about 5 min. She also yawned while I held her. Aren't these signs of a RI? I'm hoping it isn't anything but I am going to keep an eye on her for a while. She is in shed however so I don't know if that could possibly have something to do with it, like maybe it was her skin cracking a little bit while she crawled around my hand.

When would I need to take her to the vet if it keeps going? I have heard this isn't something that goes away.