I have to agree with the other posters on here. I have told you many times before that I have homeschooled since the beginning and have a chubby son. I also have a son who looks like we starve him, yet he eats more than anyone. If someone on this thread went by height and weight they might say obese, but the doctor said he was normal for his body type. All my children get the same amount of exercise and have different body types. Sometimes it’s just genetic. My bigger children are built like their father’s side (who are large people, but not obese). My twig is built like I was when I was a kid.
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If the doctor says he is normal for his body type then he is NOT fat. He must fall into the category of the non-fat homeschoolers that I have been describing.
Now it is likely that fat homeschoolers exist. Your son is not one of them. The doctor has told you so. If fat children who have been exclusively homeschooled exist, then I have not met them.