I need help i have a bearded dragon and i don't know why but he doesn't eat the stuff thats required for him. he eats crickets like a crazy person, but i want him to be healthy. so what is some good stuff for him to eat that he would like. also what is a good terrarium size for him. right now i have him in a 40 gal tall(i don't think he likes it).he is about a year and 2 months old. im not sure the real size.