Since my dog is already 11, her veterinarian wanted to do some routine blood work to clear her for the anesthesia she was going to need for her yearly dental cleaning. The doctor gave her the green light for the anesthesia but said the blood test indicated that she might have chronic kidney failure. This has since been confirmed with an analysis of her urine in addition to imaging of her kidneys. The vet says she could potentially live for several more years but that she must begin treatment right away. How could I have missed this?