Sometimes my veiled chameleon (4 months, male) will open his mouth really wide for about a minute and squirm his body around randomly. I tried feeding him to see if he was hungry, but he didn't eat. Is this a bad sign?
It either means he's mad (gaping), stretching because of shedding, or he has his mouth open because the temp is too high. Might be a medical reason that I'm unaware of. Vid?
A yawn, twist to the side followed by a shudder? Does it usually happen shortly after they’ve warmed up for the day? If so, it’s perfectly normal and I, personally, all it their morning stretch but others may have other pet terms for it. I can’t give any physiological reasons or if they do it leading up to a shed for it but all chameleons do it.
I didn't think of that because mine don't seem to do it, but if it's something he only does first thing after basking then it's the morning stretch and nothing to worry about like Trace said.