My cat has enlarged kidneys, but they've been like this for a long time, so what causes it & what co

Best Answers

  • Judy WilkinsJudy Wilkins MissionMember Posts: 162
    Accepted Answer
    Generally, when a cat develops CRF (chronic renal failure - their kidneys are failing), the kidneys become small & hard. But in some cases, the kidneys are enlarged. It's called polycystic kidney disease (PKD) & happens mostly with Persian & Himalayan cats. It's an inherited genetic defect. If your cat is one of these or his/her parents are, this may be why. If your vet told you your cat had enlarged kidneys, he really should provide you with more info? Did he explain anything else or what to watch out for? There are signs to watch for if the kidneys are getting worse. Cats are born with it but usually doesn't show till they're around 7 yrs old. The disease is progressive, more cysts developing & getting larger as they grow older. *IF* your kitty has this, please read about Harpsie's here: While it's not curable, there's lots to help your kitty as Harpsie was helped. Another well-researched excellent website on CRF is found at
  • Joy WaltersJoy Walters Member Posts: 9,276
    Accepted Answer
    I can't give you medical advice, but my cat Shizzie had one very large kidney and one little one. Since I adopted him when he was already 10, my vet couldn't really say if it was genetic or developed when he got older. Since he'd never even been neutered, I don't think his previous owners really spent much on vetting him, so he was never treated. Eventually, Shizzie did suffer renal failure and had to be put down. I don't know if it was because of this or if he was just one of those male cats who develope kidney problems as they age. My point is that you need to keep in touch with your vet on a regular basis. They could probably even reccommend a specialist if you want to go that way. I'm not sure there's anything that can be done, though. Shizzie lived a good life and didn't become really ill until a week before he went to The Bridge.
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