Using the same logic, I've been experimenting with hummus (fully composted leaves -- soil conditioner, actually) in the enclosure. My "persnickety" one was doing everything he could to circumvent my strategies for keeping him out of the dirt in the pot. He got very good at hanging upside down from the lowest branch and zapping soil out of the drainage holes. Since chams like roaches, and roaches in the wild love leaf litter, I wondered if there's something in decaying leaves (hummic acid?) that the chameleons need. Sure enough, I put about 2 tablespoons of the compost on plastic lids and set them in the bottom of the cages. Within 30 minutes both my panthers were 4-on-the-floor taking big mouthfuls, despite the fact that they had eaten several crix and silkworms just an hour before. I'm still not sure what this is about, and it could turn out to be poor husbandry practice, but for now, like you, I'm trusting my interpretation of my chameleons' pretty clear signals. I've done this once a week for about six weeks, keep the amount limited, monitor closely, and so far, no problems.