@jajeanpierre They are in fact very fragile and require expert care. As far as temperatures goes, it's not so much that they need a lower temperature, but more that they need a greater difference between their basking and lowest points of comfort. Basking spots should stay between 85-95....lower area should range in the mid 60s to mid 70s....its a good idea to keep a thermometer at the basking spot as well as one on the middle and one on the lower portion, since it allows you to more accurately monitor things. Humidity, as with most chameleons, should be high (although Veileds tend to adjust well to dryer areas, they are bettered suited in high humidity). With my babies, I assure that my misting system is more precise and has only a 5% space for variation throughout the day. With adults, that changes to 15%. What's the reason for this? As you mentioned, they are more easily dehydrated. Always make sure to watch and make sure your baby is consuming enough water and is able to recognize sources. Also, misting systems should be set up so that they only cover an portion of the enclosure, leaving a dry space for your cham to go if it does not want to get wet. Soaking a chameleon and cooling its basking spot can make them sick.