my son is 2,5 years old and he is still only 19 lbs and hasn't grown in the last 18 months. he is only 24 inchs tall. His co-ordination isn't good and has very slow speech. He did not sit up untill he was 9 months old and he didn't walk untill he was 18 months.
it doesn't matter how much he eats he doesn't put any weight on.He cannot poo without lactulose.