P.S.
Give them each some of the new food to try. Tell them that if the eat the new food then they can have some of the foods they like. Give them more of the new food to eat than the foods they are only wanting to eat. If they refuse the new food know that they can also have some of the foods they like. Don't cave in & just give them the food they want or they will never change. Also if they refuse the new food tell them they are not eating then & do not cave in later. To eatting only what they want. You maybe have to refuse to cook the foods they want. And also once you are out of the hot dogs & etc. Do not buy more until your they eat the new foods.