I have a child who also stutters. Try to take them as soon as possible to a slp that works with cognitive behaviour therapy. Also teach them to be positive about their speech and teach them positive affirmations about stuttering. The most important thing is that they can say what they want to say, without any shame or fear, with or without stuttering. Never give them any negative vibes about their speech. Let the child repeat that it is ok to talk the way they talk. We can't change our genetics but we can make ourselves less sensitive to triggers.