What a Senior Cat's Water Bowl Can Tell You
Chronic kidney disease is one of the most common conditions in older cats. Cornell's Feline Health Center puts it at up to 40 percent of cats over the age of ten, and 80 percent of cats over fifteen. The only known risk factor for developing it is age, which is why they argue that senior cats should be monitored on a schedule rather than watched for symptoms.
Early kidney disease hides on purpose
In the early stages it is very common for a cat to show nothing at all. The body compensates for the loss of function, and it compensates well. By the time something looks visibly wrong, a meaningful amount of kidney function has usually already gone, which is the whole argument for regular bloodwork in an older cat rather than waiting for a sign.
The water bowl is often the first thing anyone notices
What does eventually show up follows a fairly recognisable order. As the kidneys lose the ability to concentrate urine, cats pass greater volumes of it, and drink more to keep up. That is why the change an owner spots first is usually domestic rather than clinical: a bowl that empties faster than it used to, or a litter box that needs scooping more often.
Loss of proteins and vitamins in the urine can start to affect appetite. Later, as waste products build up in the bloodstream, the cat feels genuinely unwell: lethargic, losing weight, and stopping the careful grooming that kept the coat in order. An unkempt senior cat is worth taking seriously rather than putting down to age.
The knock on effects matter too
Cornell also note two associated risks. Kidney disease can lead to high blood pressure, which is capable of causing sudden changes in vision or neurological signs, and it can lead to anemia. Both are reasons that a cat already diagnosed needs monitoring rather than a single visit.
What to watch for: a water bowl emptying faster than it used to, a litter box needing more scooping, a cat that has stopped grooming itself properly, or weight coming off a cat that is still eating.
General information for pet owners, not veterinary advice. If your cat is over ten, the most useful thing on this page is the suggestion to ask your vet about routine senior screening, rather than anything you can watch for at home.
Source: Cornell University College of Veterinary Medicine, Cornell Feline Health Center, Chronic Kidney Disease. Photograph by Abeer Zaki on Unsplash, an adult cat standing in, since the library holds no genuinely senior cat.
