high low asymmetrical wears

Need advice on a low purine raw diet. One of our dog's (Truffles) has come home for hospital after needing surgery to remove an abnormal kidney that had become blocked and died due to her treatment for Leishmania. The drug caused kidney stones. The vets said we need to put her on a conventional food for her remaining kidney that also has some stones in it. Any advice would be great. high low asymmetrical wears