Hey I'm soooooo upset. My 22 month old has a few small black spots on his teeth. I brush his teeth throughly despite him hating it morning and night. He only drinks milk and water has never even tried juice. He has no sweets or chocolate, no raisins, nothing. Main snacks are cheese, breadsticks, rice cakes, yogurt and fruit. What am I doing wrong?? Why has he got them??