I suspect, though I'm not certain, that your chameleon eats more flies.
The chameleon usually eats crickets, but if we put a fly in her cage, ZOT, it’s gone. Except now, when she’s recovering from laying about 50 (infertile) eggs, poor thing. My husband and son are feeding her crickets with chopsticks, trying to get her strength up. It’s a tough life being a female lizard.