E.M.
Despite my parents' best effort to keep my baby teeth perfect, they were filled with horrible cavaties and were incredibly brittle. It had nothing to do with how they were cared for and what I ate/drank. I never had my first taste of candy & soda until I was nearly 4 years old, yet my teeth were falling apart. I just had very poor enamel. However, on the flipside, I'm in my early 30s and my teeth are still in perfect now. Take her to the dentist. Cavaties in baby teeth are not the end of the world so long as you get them taken care of quickly! The longer you prolong, the worse you could be making her adult teeth.