sorry but it's not advisable. Chameleons are extremely territorial and they stress real easy, which leads to their immune system going haywire and that leads to real bad news. That's why it's not advisable to handle them much either, only when necessary. Baby veileds seem not to bother much with being handled but once they reach- what do you think everyone? 8 months or so?- they usually become very aggressive and want nothing to do with humans, or any other creature except insects for that matter. You also have to consider that their husbandry issues (their habitat needs, like temp. and humidity) are different and chameleons are very sensitive to their correct needs. Keeping them together would lead to trouble for sure. I hope this helps, L~