We took ds for his six week check today (he is 12 week so a bit late) and the GP asked if he was reacting to sounds but we didn't think to look for it. When we got home we tried shaking a rattle near him, slamming the door and shouting him, all with no reaction whatsoever. The only thing he reacted to was a pan being banged with a spoon right next to him and even then he wasn't that bothered, he just blinked. Should we be concerned? Our eldest had to have grommets and dp had hearing problems as a child.