Both my girls have discolored teeth even though we brush morning and night (well most days) we are on tank water so i wonder if it's beacause we don't have fluoride OR if it's because they eat so much fruit.
DP's cousins little boy had to have his teeth fixed (he's 6) even though his mum is meticulous with his diet and his teeth brushing, the dentist said it was his milk before bed and the fruit he was eating every day and that parents should be brushing their kids teeth until they are about 10 as kids just don't do it properly or for long enough

Am hopiong my girls don't have teeth issues too.