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    Your Cat Is Thirsty – Find Out Why

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    Updated: September 18, 2018


    Reasons Why Your Cat May Be So Thirsty

    An increase in thirst is quite a common thing for cat owners to mention during vet visits. Of course, it’s also common for them to miss the increased thirst, but bring up the other “end” of the issue… increased urinations.

    Were you aware though that there are actually many potential causes of increased thirst and/or urinations in cats? These can include:

    • A change in the weather and/or humidity
    • A change in your cat’s activity level
    • A change in your cat’s food
    • A urinary tract infection
    • An overactive thyroid gland
    • Progressive kidney disease
    • Diabetes

      As you can see, even just from this partial list, there are many possibilities. And what’s more, each of them warrants their own level of concern.

    A visit to your vet will be necessary to determine the actual underlying cause in your cat’s particular case.

    Here are 3 things you can do prior to visiting your vet to help the work-up along


    1. Pick up a bottle of Keto-Diastix at your local pharmacy. These are easy-to-use keto-diastix-tipreagent strips that allow you to quickly and reliably check for the presence of glucose (sugar) and/or ketones in your cat’s urine.
      The presence of glucose in your cat’s urine may indicate diabetes, while the presence of ketones may indicate the presence of a severe metabolic emergency of undiagnosed/ uncontrolled diabetes or diabetic ketoacidosis (DKA). Learn more about diabetes and DKA in cats. Note: glucose or ketones in your cat’s urine is NOT definitive for diabetes or DKA, as either can be present for a few other reasons, too.

    2. Measure the amount of water your cat is actually drinking in a 24-hour period.
      • Fill their water bowl(s) with a measured amount of water first thing in the morning, then keep a running total of additional water you add throughout the day (if any).
      • First thing the following morning subtract the amount of water still left in the bowl(s) from the total to determine how much water your cat drank in the preceding 24-hour period.
      • Do this a couple of different days and bring those numbers to your vet so they can calculate if your cat’s water consumption is truly excessive. (*Note that this can be more difficult to do in a home with multiple pets, but it can still be accomplished by separating out the cat in question for a day or two to specifically measure their daily water intake.)

    3. Read about the information your vet can get from testing your cat’s urine, and what it can mean. You'll also get tips on how to collect your cat's urine.

    How much water should a cat drink – how much is too much?

    If your cat is persistently drinking more than 0.8 ounces per lb (50mls per kg) of body weight per day (24-hour period) it could be excessive and mean that a veterinary evaluation is necessary. Anything persistently over 1.5 ounces/lb/day (100mls/kg/day) is definitely excessive and in need of veterinary evaluation. 

    For example: a cat that weighs 9 lbs would be drinking too much if they drank over 7 ounces per day and if they drank over 13.5 ounces that would be way too much.


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    Topics: Diabetes in Cats, Overweight Cat, Blog, Outdoor cats, Indoor cats, Ketones, Water, Thyroid Gland, Cat urine

    Please do not ask emergency or other specific medical questions about your pets in the blog comments. As an online informational resource, Preventive Vet is unable to and does not provide specific medical advice or counseling. A thorough physical exam, patient history, and an established veterinary-patient-client relationship is required to provide specific medical advice. If you are worried that your pet is having an emergency or if you have specific medical questions related to your pet’s current or chronic medical conditions, please contact or visit your veterinarian, an animal-specific poison control hotline, or your local emergency veterinary care center.

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