Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Why Is My Cat Drinking a Lot of Water Suddenly? 6 Vet-Reviewed Reasons

Share

cat drinking water

Cats, due to their nature and small size, don’t drink large amounts of water. The typical, healthy house cat will drink about 5 ounces of water daily, just over half a cup. Many cats drink less water, however, depending on their diet. For example, a cat that’s fed wet kibble will drink less water since there is more of it in their food. The reverse is true, also. A cat eating dry food will drink more water every day.

What happens if your cat drinks substantially more water, enough for you to stand up and take notice? That’s what we’ll discuss below while we look at six possible reasons for your cat’s increased thirst.

divider cat paws oct 2024

The 6 Reasons Why Your Cat Is Suddenly Drinking a Lot of Water

1. The Weather Is Hot

Depending on where you live and how much your cats go outside, they may have increased thirst simply because they are hot. Remember, cats walk around all day in fur coats. They will drink more water to stay cool and comfortable in hot weather. If a cat sweats, the place you’ll see it most is its paws! If you see footprints on the floor from damp kitty feet, your cat’s been sweating, so make sure they have enough water.

kitten drinking water
Image By: AleksandarMilutinovic, Shutterstock

2. You Recently Switched to Dry Cat Food

As we mentioned earlier, when cats are given dry cat food, they usually drink more water since there’s less in their kibble. One reason your cat might be drinking more is if you’ve just changed from wet kibble to dry kibble, something you might do if your kitten is now a full-grown cat. Since their new, dry food has less water content, it makes perfect sense that they would drink more water to make up for it.


3. Kidney Disease & Chronic Kidney Failure

A cat’s kidneys play a critical role in its health. First and foremost, the kidneys filter out toxins in a cat’s bloodstream and remove them from the body. The kidneys also produce new hormones to make new red blood cells essential for maintaining your cat’s proper blood pressure. If your cat has kidney problems, their thirst level will increase substantially as their kidneys need help.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money


4. Diabetes Mellitus

Although it’s a long-term condition, diabetes in cats is treatable. Even better, with the right treatment, your cat might suffer very few effects of the disease. However, if left untreated, diabetes can cause increased thirst in cats. If they don’t seem to have other symptoms but start drinking more and more water, have your cat tested for diabetes. You might also notice increased urination, appetite, and weight gain.


5. Hyperthyroidism

If you notice that your feline is drinking and eating more but is losing weight rather than gaining, they may have hyperthyroidism. Feline hyperthyroidism is quite common, affecting middle and older cats more than younger ones. Caused when the thyroid produces more hormones than normal, hyperthyroidism has several symptoms. One of the most pronounced is increased thirst.

cat drinking water from fountain
Image By: Daria Kulkova, Shutterstock

6. Urinary Tract Disease

Today, certain urinary problems in cats can be implicated in cats who have increased thirst. One such condition is a urinary tract infection, which is more common in females.

divider cat paws oct 2024

Final Thoughts

Why is your cat drinking a lot of water suddenly? As we’ve seen, there are six reasons. Two of them are easy to solve, three can be treated, and one (the worst) usually afflicts older cats. If your cat looks and acts healthy, the reason for their extra thirst is probably no cause for alarm, but keep an eye on them for 24 hours just to be sure. Then again, if it’s not hot or your kitty is showing other signs and symptoms of a health problem, a visit to your local vet is recommended. Their increased thirst might be a sign they need medical care.


Featured Image Credit: rihaij, Pixabay

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Rescue Cats Deserve Beautiful Endings

We all know that beauty is only skin deep, and that scars always tell a story, and this is one cat with a...

Ask Dr. Paola – Help! My Cat Gets Diarrhea from Wet Food! (March 23, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Cat Shampoo Alternatives That Are Already in Your House

If your cat has ever gotten into something disgusting and you’ve found yourself without cat shampoo, we’re here to help. Before you panic...

Licky Treats: A Scientific Investigation into the Tube-Based Delights Taking Over Modern Cat Households

By Professor Lucifer Fluffovich, Department of Applied Snackology Human civilisation has produced many inventions of questionable usefulness: vacuum cleaners, pyramids, and the laser...

More related

How to Cope With Losing a Cat: 7 Tips for Helping Grief

Coping with the loss of your beloved feline is not an easy process. Cats have a way of capturing the hearts of those...

How to Detect and Prevent a Cat Attack: 4 Signs & Prevention Tips

We’ve all been there. You’re relaxed, petting your cat, when they suddenly turn and scratch, bite, or swat at you. It may seem...

The Pet Fund’s $100K Mission: Saving Pets from Shelter Surrender and Euthanasia | Heroes of the Pet World

This heartfelt piece comes to us from The Pet Fund, the largest nonprofit in the U.S. dedicated to funding veterinary care for companion...

What Kind of Toys Do Blind Cats Like? 4 Vet-Reviewed Types & Suggestions

If you find yourself the proud owner of a blind kitty, it can feel like there are a whole host of things that...

Keep reading

Can a Cat Detect Bed Bugs? Vet-Reviewed Facts & FAQ

Cats have extraordinary eyesight and sense of smell and are well-known to excel at hunting. Many cat owners have also witnessed their cat catching a fly in midair! But if cats are such great hunters, including tracking down tiny spiders,...

young tortoiseshell and white norwegian forest cat lying in bed

Are Cat Cafés Good or Bad for Cats? Vet Reviewed Guidelines

Any cat lover would be attracted to the idea of visiting a cat café, where they can make new furry friends while sipping their favorite coffee. While it sounds like a fantastic idea, and the popularity of cat cafés is...

cat cafe in thailand

Why Do Cats Move Their Ears? Vet Reviewed Science & Meanings Explained

Cats are incredibly expressive animals, and while they can’t mimic human words, they have a wide range of ways to convey feelings through their body language. As well as their eyes and tail, cats can portray a lot of emotion...

close up image of cat's ears and eyes

Can Cats Eat Hot Sauce? Vet-Verified Safety Guide

Knowing what your pet can and can’t safely eat is part of your responsibility as a pet owner. Unfortunately, no matter how careful you are, cats have their own mind. Sometimes they eat things that they shouldn’t, and smelly human...

Can Cats Eat Hot Sauce

Why Do Cats Like Smelly Stuff? Facts & FAQ

Dog owners are painfully aware that their pets are often attracted by strong scents. However, many cats also seem to enjoy robust odors, such as dirty laundry or stinky shoes. Have you ever wondered why, especially since cats generally take...

Cat smelling laundry basket

Can Cats Eat Oreos? Vet-Approved Nutritional Facts

You’re dunking your favorite cookie—an Oreo—into a glass of milk and your feline is staring you down. As their eyes of curiosity check out what you have, you might wonder if you can give them a little sample. We all...

Can Cats Eat Oreos

Why Does My Cat Smell Bad? 17 Vet-Reviewed Reasons & Solutions

You know how unpleasant it can be when your feline friend starts to smell bad, especially if they like to jump into your lap. While cats are generally meticulously groomed creatures, sometimes they need a little help staying fresh and...

woman with smelly cat

Can Cats Eat BBQ Sauce? Vet-Reviewed Facts

Firing up your grill for a barbecue dinner, lunch, or snack is a delicious way to enjoy a meal. However, most barbecues typically involve cooking meat, which is likely to interest your cat. Most meat, particularly if it isn’t seasoned,...

Can Cats Eat BBQ Sauce

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.