Bearded dragon help? *10 points*?

Ok, my 4 month old bearded dragon , Iggy, has stopped eating, I've had him for a little under a month now , he hasn't ever eaten much. He doesn't drink to i give him a bath daily. He is on a diet of Meal worms / crickets and greens ( parsley, ernut and peas) I took him off Calc-sand yesterday as I found out it causes impaction. I think he might be shedding but im not sure, and he has everything he needs. Anyone ?