Some (including FReepers) have referred to Prader-Willi syndrome. I know almost nothing about it but obviously it’s a possibility with this kind of growth.
However, I am also swayed by those who say that China’s one-child policy leads many parents to spoil a kid rotten since it’s the only one they will have.
Of course others knew the name of the syndrome - I posted too quickly before reading their comments. I do think a LOT of the weight issues with children are due to spoiling and because too many people rely on fast food these days - but I’ve seen a few documentaries on that Prader-Willi syndrome and it is heartbreaking. It is like watching a crack addict - these people literally are chaining their refrigerator at night. It would be a horrible feeling to know that your child was dealing with something so destructive to their health.