What did Kino and Juana decide to do when the doctor refused to treat Coyotito?

From the text:

Juana went to the water and waded in. She gathered some brown seaweed and made a flat damp poultice of it, and this she applied to the baby's swollen shoulder, which was as good a remedy as any and probably better than the doctor could have done. But the remedy lacked his authority because it was simple and didn't cost anything.