Linda-Someone mentioned this to me ages ago (I think when DS was still a babe). I *think* I remember doing some poking around on the internet to see what I could find out. I don't think he does have SID, but I need to know more. Do you have any resources you could share??? He is, however, very sensitive to external stimuli. But I know with SID there could be a whole host of other things going on with the child, too. Thanks for any info you can provide and for your reply.