Or someone abandoned a retarded little girl in the forest and she ended up staying with the only creatures that cared for her.
She had to have been with them a while if they defended her.
Obviously retarded children in India have value as tools for use by beggars. They will use their own or they will buy them from families. Especially profitable are the microcephalics.
I suspect too that she was profoundly mentally challenged and was put in the woods to die, maybe just a couple of years ago...
in any case, poor little thing....I pray for the best for her, mostly not to be under the microscope the rest of her life.