I cut my snacks way back to the point of being a drink and a cracker and that is it. One due to the amount of time it was taking to get everyone up, served and washed up. Also I have kids picked up starting at 4 and they dont' get up til after 3 so by the time we do diapers and get beds put away we dont' have a lot of time either for some.

Once I stopped serving so much snack they ate a much better lunch. For sure if they are getting the servings of food at snacks then limit lunch in the sense of saving a serving of each food group for supper and if that means limiting seconds/thirds then you should or they are truly overeating calorie wise and that is not good for them.

I want my kids to experience the feeling of getting hungry and then eating a meal to satisfy that. By constantly giving them food every couple hours they never get that sensation. But having a drink is important even if it is water but milk or juice helps to stave off the whines and poor behaviour just before mealtime.