I bought my beardie, Shelly, about three weeks ago now. She is very energetic and eats a ton (bugs ONLY - she won't even pretend to eat anything else). I check the temps in her tank and they seem to be ok, and she's not lethargic...she doesn't seem to be sick but her head started changing colors. This may be a silly question, but I'm new to dragon ownership. Is she shedding?