Oni did that, and actually chipped one.
It's not a SERIOUS chip, but it's chipped. My mom (a dental hygientist) said it'll smooth out as she grows. The more she eats, the smoother it'll get.
I hated it and PANICED when I saw that it was chipped!! I thought it would hurt, but it doesn't bother her at all. It's been about 9 months since that happened and it's already basically fixed itself!
Sarah