Symptoms of Kidney Disease in Cats

Kidney disease is one of the most common causes of death for adult cats. Unfortunately, symptoms of kidney failure often go unnoticed until the condition becomes chronic or terminal. Keep an eye out for these signs and symptoms, and contact your veterinarian if you suspect your cat is suffering from kidney disease.

Increased Thirst and Urination

Increased thirst is usually the first symptom of an infection of the bladder, kidneys or urethra. This is usually followed by increased urination, but the cat may be unable to urinate, depending on the severity of the disease.

Bloody Urine

Blood in a cat's urine may be caused by cystitis (an infection of the bladder) rather than kidney failure. However, cystitis can quickly spread to the kidneys or cause a blockage, especially in male cats.

Sudden Weight Change

A cat with kidney disease may suddenly lose weight due to dehydration, or suddenly gain it because of excess fluid retention.

Urinating in Unusual Places

Cats with kidney disease or cystitis often urinate outside the litter box to communicate their discomfort, or because they have lost continence due to the infection.

Vomiting and Diarrhea

Due to buildup of toxins and fluid, a cat with kidney failure may have foul-smelling, very aqueous, or bloody vomit and diarrhea. Other cats become severely constipated due to dehydration.