I don't know if I ground my teeth has a baby. I am sure some of that is normal. I did not realize I ground my teeth until a dentist told me I did when I was in my thirties. I broke myself of the habit of clamping down on them during the day, which I came to realize I was doing. The night time is another big problem. I wear a retainer most of the time. Sometimes i forget, but even with the retainer, I grit down on my retainer (or my teeth if it is not in) and I don't know I am doing it until I wake up in the morning with a stiff jaw. I think the best thing to do is keep an eye out for the problem as the child gets older and if need be and a dentist agrees, get her used to a night retainer that she will probably need to wear forever. I don't know if the habit can ever be broken. Maybe hipnosis, but who knows? I have lost a lot of tooth mass and I am hoping I can save what is left of my teeth, which emphasis the importance of getting to the problem sooner than later.