It is going in to shed, and this is normal. They will look dull and the eyes look cloudy. This will then clear up and look more normal. Usually within a week or so the old skin will come off. They can often be sensitive to touch at this time, and also will usually not eat. However after a shed they are usually pretty voracious! Lizards will also look dull, but they don’t all shed in one piece. They often eat their sheds as well, so you may never actually see shed in the cage.