I purchased a Jackson Chameleon about 2 months ago. He is about 4 in from head to tail. I feed him about 5-6 crickets a day. Have the uvb bulb and the 40 watt bulb as well. Today upon getting home i noticed for the very first time that he was on the top of the cage hanging upside down with his mouth gaping open. I remember somewhere reading on this forum that it is a bad thing or there is a reason why. If someone can please help me as to why he is doing this. He doesn't seem to be in any stress, but I maybe wrong if someone can please help me I would very much appreciate it.