If you're reading this, it probably went something like this.
She went in for routine senior bloods. Or you'd noticed the water bowl going down a bit faster than it used to. The vet came back into the room, sat down, and said the words "early kidney disease." Maybe "stage 1." Maybe "her SDMA is up a little."
No tablets. No special food yet. "Let's keep an eye on it and recheck in six months."
And somewhere on the drive home, with her quiet in the carrier on the passenger seat, you typed "how long do cats live with kidney disease" into your phone at a red light. You read a number. It made you feel sick.
If that's you, I want to tell you two things. The second one matters more.
The first: it isn't too late. You found out at the earliest point there is.
The second: from today, the clock is running.
Right now she has more working kidney than she will ever have again. Every piece she loses from here is gone for good. No tablet, no food and no vet can grow it back.
And you've just been handed six months with nothing to do.
Most owners spend them waiting. Then they walk into the recheck and find out what the waiting cost.
The Drive Home I've Watched a Thousand Times
I've been a vet nurse in feline medicine for twelve years. I've sat in on more kidney conversations than I could count, and the stage 1 ones always go the same way.
The owner walks out with two feelings at once. Relief, because the vet said "early" and there's nothing to give yet. And dread, because "kidney disease" is a phrase everyone has heard end badly.
Six months later, they come back for the recheck. And I've learned to tell, almost before the bloods come back, which kind of owner just walked in.
Spent six months waiting
Watched her, worried, kept the recheck date. Walks in hoping the number hasn't moved.
Spent six months working
Worked every day on the one thing that decides what that number will be. Walks in knowing she used the time.
This article is about how to be the second kind.
What Stage 1 Actually Means
Vets stage kidney disease from 1 to 4, using a system called IRIS. Stage 1 is the earliest. At stage 1, her creatinine (the classic kidney number) is usually still normal or close to it.
That's why so many stage 1 cats are picked up by a newer marker called SDMA.
On average, SDMA flagged kidney disease in cats 17 months earlier than the standard creatinine test, in a study from Oregon State University.
Think of her kidneys as a savings account she can never pay back into. Creatinine often doesn't climb until roughly three-quarters of the account is already spent. That's when most cats get diagnosed.
Your cat was caught with the account still mostly full. That's the good news. The bad news is that nobody has stopped the withdrawals.
And the stage at diagnosis is one of the strongest predictors of how long a kidney cat lives. A study of 211 cats at the University of Michigan tracked survival by stage:
Median survival by IRIS stage at diagnosis. Boyd et al., Journal of Veterinary Internal Medicine, 2008 (211 cats).
Stage 1 isn't on the chart because the earliest cats in the study were already stage 2.
Now look at the gaps between the columns. Cats found at stage 3 lived about a year less than cats found at stage 2. Cats found at stage 4 lived about three months. Every column to the right is kidney she doesn't get back.
Her number isn't written yet. Which column she ends up in depends on how much she still has when someone finally starts protecting it. That's what the next six months decide.
