How long does it take for an old dog to die from renal failure?

How long it takes for an old dog to die from renal failure depends on the situation. Acute renal failure and chronic renal failure are different, and the progression of the disease is also different. Generally, acute renal failure is reversible if treated promptly. Chronic renal failure depends on the progression of the disease. Generally, the survival time for stage four or above renal failure will not exceed 1 year, and the survival time for stage three may be 2 to three years. For stage 2 or below, with the use of drugs, the survival time is generally Not life threatening.