Please don't be too hard on yourself. I have two boys, aged 6 and 7 - they are like chalk and cheese. They have been raised pretty much the same way, there is only 11.5 months between them so I don't believe my parenting style would have changed too dramatically. If I had answers, I'd willingly share them. We've been to the GP a few times, and we're currently seeking help through the school psychologist.