my brother had a severe stutter when he was a kid, and fortunately grew out of it. i, however, still retain my stutter though i’m still young. i personally think that it’s wonderful to be worried about your son. stutters suck and people still don’t understand what they even are, but you have so many more years to work this out with your son. your support is the best thing that he can have. it’s definitely what i needed when i was younger.