my male veiled has been opening his mouth a fair amount the last few days. The temperature hasn't changed. He only does it in the basking spot, temperature is 88. He's about 4 months old. Just curious if this is normal at all. Thanks
Normal if the basking spot is too hot. How are you measuring it? Could be hotter than it says. Try moving the light away a little and see if the behavior changes.
I've personally found that most people tend to jump the gun on this type of behavior since they tend to not see it. The chameleon has reached "OPTIMAL" temperature to thermoregulate to aid in digestion. There would be an issue if the chameleon was in the bottom of the cage having this behavior. As long as your cage has a point where he can go and cool down "Low 70's". You'll be fine.