Here’s how my thought process would go:
Problem: chameleon vomits
(though many haven’t witnessed this, I have heard that this can be common, especially among veileds)
What, logically, could cause this?
- upset stomach do to bacterial/viral infection
- parasite problem causing either nausea or blockage
- an impaction/blockage such that the stomach contents can’t proceed through the gi tract
- what experts have called a too homogenous gut content: too many soft worms/low chitinous bugs in the diet have created a loose mass that the (for lack of a better term) guts can’t grab and pass on
- some genetic deformation of the gi tract
There are probably more possibilities here, and I hope others will post some. Once you have what looks like a fairly comprehensive list, then you and your vet can work on eliminating possibilities. Also, I have heard that vomiting is not as unusual as we think...But then again, I hear a lot of things, and I’m absolutely not an expert, scientist or veterinarian.