Is that all you are feeding meal worms? If so, that is a very poor diet and you should have their diet consist of a variety of feeders Are you using a multivitamin everyday? If so, do not do that. You can cause a lot of problems overdosing on vitamins. The calcium you are using should NOT contain d3. If it does, then get a calcium that does not contain d3. That can be used at every feeding. Can your chameleons see each other, even though they are caged separately? If so, then put something up so they cannot see one other. Other common feeders are crickets, roaches, silkworms, hornworms, superworms, moths, stick bugs, phoenix worms, butterworms... there are many other choices other than meal worms. Can you please post some pics of you chameleons and your set ups so we can make sure everything is ok?