I wasn't trying to say it was a good sign. I do have a vet appointment scheduled so we will find out for sure soon. I what I was trying to say was that there have been no other signs of RI, so I don't think it's an advanced RI. The bubbles don't happen every time he hisses either. I've been checking on him daily and I've only seen bubbles 3 times after he worked himself up a lot. I honestly think it's just his saliva, but I have considered that it could be a RI which is why I wanted other opinions first before rushing to the vet.