When did the family's approach to healing shift from medical science to divine intervention for their son's bone-cyst?

The shift in their approach occurred when medicine reached its definitive limit. Chapter 34 explains that the boy's uncle was a physician, and he, along with other doctors and surgeons, tried everything they could. They attempted various treatments, both native and foreign, and even performed surgery, but nothing succeeded and the boy's suffering continued. It was only at this point, when all expert efforts were exhausted and the disease did not subside in the least, that the relatives suggested worshiping deities. This marked the transition from relying solely on medical science to seeking a divine remedy, which ultimately led them to hear about and travel to see Sai Baba in Shirdi as a last resort.