My new veiled chameleon has a little black dot right in the center of his head. It's not a mite, I can easily distinguish mites from skin. It's a little blackish grey spot. What is this? He also has black marks outlining the yellow when he gets angry, but this isn't like this. I've had him for almost a full day and I noticed it as soon as I unboxed him. Just didn't think anything of it then.