My 5 year old ds has always been a fussy eater. He likes pasta but not much else and never touches vegetables. Generally he puts away about the same amount of food as our 2 year old, who enjoys food and runs to the table and eats heartily, with appetite. Our older son always has to be coaxed to eat and is an incredibly slow eater, I don't think he gets in much at school lunchtime at all. It can't be right that he's only eating as much as a 2 year old? Weight wise, they're both slight, and light for their ages. Have had doctor check him out but found no physical problems. Can a 5 year old thrive on so little?