I just noticed a small cavity on my dd bottom molar on the right side. I just too her to the dentist Aug 21 and she had no signs of one. We brush twice a day, she uses mouth wash every night. She says it doesn't hurt. Anyways I'm making her an appt in the morning but wanted to see if any of you had experience in this area. How do they treat cavities when they are this little? Do they do fillings at this age?