I always tell my friends and relatives that if their child or even adult friend stutters even a little bit, take them to a speech therapist. As their stutter is not in danger zone, they can be treated really easy. maybe even 10 sessions will do them the job. You just need to learn some technics for relaxing your body and control the air flow while speaking. treat it faster and you won't have other problems that come with stuttering in the long term like depression, reduced self-confidence and avoiding social activities.