Sign of RI

[Rickys_Reptiles]

I have the same question--one of my snakes picked up an RI and was moved to qt immediately when I noticed (and is now on a fortaz treatment). But now I am paranoid that I spread to the rest of my collection before I realized she had it. Many of my snake have a few bubbles here and there in their mouths/throats when I look inside. Is this typical of all snakes, or have I spread the RI around?

Are the other snakes:

1) Eating?
2) Holding their heads upright (looking up to the sky)?
3) making any kind of clicking of wheezing sounds?