Is my cat drinking and weeing too much?

isolated cat


  • Is your cat drinking or weeing more than usual?
  • You may hear your vet use the words polyuria and polydipsia (PUPD for short).
    • Polyuria = weeing too much
    • Polydipsia = drinking too much
  • The two symptoms often come together because the more your cat drinks, the more they wee, and the more they wee, the more they need to drink.
  • There are many possible causes for drinking and peeing too much.
  • If you think your cat is drinking too much, take them to your vet - never restrict your cat’s water to control the problem.

Is your cat drinking and peeing too much?

Most owners rarely see their cat drink, especially if they are fed a wet diet. This is because cats get most of their water from their food. If you suddenly start noticing your cat drinking, it may be a sign that something is wrong. Ask yourself, is your cat…

  • Drinking more than usual?
  • Thirsty all the time?
  • Emptying their water bowl more quickly than usual?
  • Drinking from taps, puddles or streams more regularly than usual?
  • Drinking so much that they vomit?
  • Visiting their litter tray more often or peeing in larger volumes?
  • Weeing in the house?

…if so, contact your vet for an appointment. It can be helpful to take a urine sample along, and tell you vet exactly how much your cat is drinking in a 24 hour period. For help with both these tasks watch our videos below.

How to collect a urine sample from your cat

How to measure how much your cat is drinking


Some of the most common causes of increased drinking and peeing include:

There are many other possible causes.

When to contact your vet

Always take your cat to see your vet if you think they are drinking or peeing too much.

Remember; if possible, take a urine sample and a note of how much your cat is drinking in a 24 hour period.

Published: August 2019

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Written by vets and vet nurses. This advice is for UK pets only.

Illustrations by Samantha Elmhurst