My daughter was born with vertical talus and still has some inflexibility in foot movement as well as an extended heel bone. As such, it is very hard to find shoes that fit as the front of the foot is smaller than normal, while the heel extends out. In your opinion, what percent of kids suffer from similar kind of feet abnormality? What kind of medical conditions, like spina bifida, might result in lower limb abnormalities? I am trying to do some research into this topic to understand if many other girls have similar inconveniences. Your insight into this would be extremely helpful!