I have a 3 month old male veiled chameleon. He's on a diet of mostly crickets with the occasional superworm. I hand feed him the superworms. I grabbed one today and it bit me several times. Dart got it but left its head sticking out of his mouth. Before he could swallow it, it twisted over and bit him and he squeaked. Should I be concerned? It didn't leave a mark but he turned dark gray when it got him.