My daughters hair has never really grown, still bald on sides and front but had a few inches on crown. Last few weeks this has been falling out and can see her scalp again all over. Took her docs thet said she seems healthy, her scalp looks fine her diets ok so they are sure it's just normal. I haven't seen any other 3 year olds with such little hair though. Any ideas why it doesn't grow or what I could do to help?