My son does get diahorrea quite a bit. He also has hayfever and more recently asthma although thankfully the asthma is not too bad and he has only needed the blue inhaler a few times. No doctor or anyone has mentioned allergy testing to me and i even got a prescription for kaolin off the doctors a couple of weeks ago becuse the diahorrea was quite bad. Anyone with any advice would be much appretiated, im thinking of taking ds to the doctor and ask for an alllergy test. Ds also has low functioning autism.