My sister's iguana is about 6 years old, and he is only the size of one of my arms (pretty small for an iguana of his age, right?). I put Hibiscus in his cage daily, but I never see him eat them. I bought a book about Iguanas and I know that they should have a WAAAAAAY more varied diet, so what should I do about that? I let him walk around our lanai outside daily so he can soak up some sun, and I also give him baths daily to get his core temperature up before I try (and fail) to feed him, and to coax him to defecate. I let him sleep in my room sometimes when it's going to be too cold out, and then I look for the feces but never find them. There are some in his cage, but not the normal amount I would think he'd acquire in a month. Is he constipated? Does this stem from his eating? Does he have an eating disorder? Is he anorexic? Help would be appreciated, he is a sweet gentle iguana and I really want to fix him up.