Kidney Failure in your dog can be tragic. Once the dogs kidneys are unable to remove harmful waste from the blood, the toxins in your dogs’ blood may buildup and be deadly. You may notice blood in your dogs urine and your dog may have diarrhea, vomit, loose appetite, and other systems. Kidney failure in a dog can be treated by restarting the kidneys with intravenous fluids and electrolyte replacement. The dogs diet must then be altered and medicine prescribed.