I was blisfully unaware of my stutering as a child too. It was until my teacher in second grade made me go to the psychologist of the school and then made my parents send me to speech therapy. I remember my mother being mad at me for some reason and I never understood why. Stuttering became an 'issue' only when I was 18 and became too self-conscious about it. Support your daughter and give her tools to defense herself from assholes kids. I really never got a problem with those but it may be because I was always the biggest kid.