My son eats allot as well. He can eat more then my husband and my husband is 6'1" and 285 pounds. So can you think of a child that can eat more then a man that big. Well my son is tall skinny and his feet are bigger then mine. My son also is for every inch he is 1.6 pounds. We got really concerned about my son eating so much and that he would never stop eating like this and start to gain weight. Well my son also has like 1% body fat and we have tried to get him fat just a bit its not working at all. He looks as though he is never really feed but trust me I go through over $800 a month in food for a family of 4. Now trust me when I say this I rarely go out to eat.
So what I was thinking is if you start a log of what your son eats and see if its going to harm him. Start to fill your house with good foods. Its not to late to teach your kids about good foods. I have always had my kids eat fruits, vegies, and less fats and sweets. Heck my kids will take fruit over candy any day and I have had to prove that a few times. So start to slowly take out the foods your kids like and start to take control of your kitchen once again. I did and I am happy I did.
Once your family sees that you mean no sweets in the house and no soda's the asking goes away unless you are at a resturant. I got the we aren't at home mom can we have some soda. I had to give in...You dont need to take out all the sweet stuff just dont have it in your home is all.
To control the bad eating and weight gain get the good foods.
In one week I go through this in fruits non-canned:
15 pounds of Bananas (from just eating them to Breads)
8 pounds of Apples
8 pounds of grapes
4 heads of Lettace
9+ pounds of Carrotts
3 pounds of Zuccinni
2 stalks of Celery
We also go through fruits that are off season for as of right now and we go through 3 melons depending on what sounds good I buy on Sundays. I had to go slow on what I took out of the house and it hit my husband harder then the kids. So I told him that he just cant have it in the house that in his Shed was fine as well as at work. So he doesnt go through candy and soda withdrawls.