What is wrong with my baby bearded dragon? second part?

my baby bearded dragon was not eating today at all from wat i could see. His skin is dark and I gave him a little bath to help with his skin. I found poop in his cage today so i didn't worry too much. He is still moving around when I take him out of the cage to be on my hand. I need to know the certain kind of leaves or salad that they eat. How many times a week to feed it that kind of food. What kind of fruit or vegetable that goes well with it. I recently bought calcium dust or powder to put on its food and I have not seen it eat any salad I put in since I got him. I got him about four or five days aago and its probably still becoming fmiliar with its surroundings but I just always lead myself towards the thought that he is dieing and it is stressiing me a little