Hey Sammiejane - I would also recommend seeing an Osteopath who does Cranio-Sacral Therapy. I had a lovely little patient with the same troubles - esp the dragging of her left foot. She saw paediatricians and GP's, had x-rays and so forth, but they found nothing abnormal. I then referred her to a Craniosacral Osteopath, and she found a great deal of tension and muscle tightness in one side of the body. After a few weeks of treatment and some easy & fun exercises to do at home, this little girl finally began weight-bearing on her left foot, and began walking shortly afterwards. So, I think that may be a really worthwhile option for your little Molly.

x Nicole