for my pet dog

My pet dog Raja, 9 yrs, male, German Spitz has not been eating since last 6 days, is on IV FLUID ,DIaGONISED WITH KIDNEY PROBLEM May be stage 3 , Vet Medicines given are Rubenol 300,Ipakitin powder and Renalof for pets.
Plain xray of abdomen showed --- radio-dense calculi in left renal pelvis, one calculus of 5mm by 4.2 mm dimension could be seen in the proximal left ureter.
Both the kidneys have stones and there is loss of corticomedullary distinction,there is renal failure, doctor said operation to remove the stones is not possible as both the kidneys have been affected,I am not sure if left ureter is totally blocked but the BUN level and creatinine are high 59.1 and 3.76
.There is high level of lethargy, complete loss of appetite, nausea,not much vomiting,drinking lots of water and urinating frequency has increased,is there any medicine in homeopathy for dogs for chronic renal problem as well as for removing kidney and ureter stones