How to Tell My Cat Has a Kidney Stone

The signs of kidney stones (calculi) in your cat, which goes by the medical term "feline calcium oxalate urolithiasis," are markedly similar to those noted in other forms of feline lower urinary tract disease. Veterinarian Lisa Pierson cautions cat guardians that not only are kidney stones and other forms of cystitis painful for your pet; kidney stones can block urine output and result in a rupture of the bladder. You may notice certain behaviors in your cat that may lead you to believe that he has kidney stones. But an affirmative diagnosis can only be made by a qualified veterinary professional through specific testing methods.

Things You'll Need

  • Clumping litter (preferably unscented)
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Instructions

  1. Basics

    • 1

      Take note if your cat falls within "high risk" groups. According to a March 2004 article in DVM Newsmagazine, male cats are more likely to get kidney stones than female cats, and those who are neutered are more at risk than those who are not. The mean age of cats who experience kidney stones is right around eight years of age (middle age). While kidney stones can be found in any cat, certain cat breeds are also more at risk: Himalayans, Persians, Ragdolls, Havana Browns and Scottish Folds.

    • 2

      Pay careful attention to your cat's toileting habits. Look for signs of straining while he urinates or "dribbling" while urinating. Note if your pet urinates frequently in small amounts. Use of sandy, clumping cat litter can better help you ascertain the frequency at which your pet voids. Blood may be present in the urine as well. Pierson notes that many times, house soiling (urinating in places other than the litter box) may occur.

    • 3

      Notice if your cat has other signs unrelated to urination. Kidney stones may cause your pet appear lethargic and depressed. He may vomit or show a loss of interest in food--or sometimes not eat at all, if kidney stones are severe.

    • 4

      Take your cat to a veterinary professional to receive a definitive diagnosis. X-rays and ultrasounds are two methods of testing used to determine the presence of kidney stones (and/or bladder stones). Your vet will most likely take a urine sample from your pet to rule out or identify other forms of feline lower urinary tract disease.