The kidneys are filters for toxins in the urine. As an older dog filtration process becomes inefficient, blood flow to the kidneys is increased in an attempt to increase filtration.
Kidney Disease in Dogs
This results in more urine and to keep the dog from becoming dehydrated due to increased thirst from the failure of the kidneys, he will drink much more water.
The early signs of kidney failure are much more water consumption and increased urination.
Clinical signs of more advanced kidney failure in dogs.
The signs of more advanced kidney failure include loss of appetite, depression, vomiting, diarrhea, and very bad breath.
Occasionally, ulcers will be found in the mouth. When kidney failure is accompanied by these signs, it is called uremia, a nitrogenous waste product associated with the failure of this organ.
Health Problems in Canines