Hi Maha,
It was a little different for Zainab,as she was diagnosed at 3 years of age,so we started chelation at 4 years,her ferritin was something between 1600 and 1700,and last time in april when we checked her ferritin was 1350.I think you can wait a lil bit,till his ferritin reaches 1000,i know it's not too far but still,and have you considered exjade?
ZAINI.