Unfortunately Tonya, I don’t think they can do anything once the long bones stop growing, or rather the epiphesal plates close over at the top of the long bones.  What I did wonder is if he had had a dose raise recently that has possibly stomped on his growth or if he has been ill and had some weeks of raised doses in the period before the check up.  that and did they do a bone age to verify the age of the bones or the bone maturity before they assume that he has stopped growing?