They get bored very easily and will fast when not expected. A wide variety must be given to be sure your iguana gets all the necessary nutrients. These are foods that they like. Fresh vegetables are best. If the vegetable is raw, it must be grated.
Canned vegetables are ok, but never use frozen vegetables.
You can feed your iguana any fruit except citrus or bananas. They especially like red fruit. Kiwi is a good source for potassium. Good treats are cooked rice, spaghetti, hard boiled eggs, noodles, plain yogurt and whole wheat bread. It is important to find a good vitamin and calcium additive for your iguana.