Being healthy of children is not only by serving proper food to them. There are times that parent doesn’t know that their children have worms like hookworm, pinworm, roundworm, tapeworm and whipworm on their body. When I am still a kid my mother always dewormed me especially on school vacation where she can see me, I still remember having a necklace of cigarette/tobacco in my neck which they believed prevent the worms to escape on my mouth, eyes, ears and nose.
You have to know that deworming your kids is very important for them to be healthy and to prevent being sick all the time, my cousin kids seems need some deworming because they are so thin even they eat in large amount. Dunno if their mother noticed it as she always reasoned out that they are so picky on their food.