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.

How to Tell If My Cat Is Dehydrated: 8 Vet-Reviewed Signs

Share

tired sick cat lying on bed

Cats don’t always advertise when something is wrong, and if your cat isn’t getting enough water, you might not even realize it if you aren’t paying attention. However, dehydration is a serious condition; cats that don’t get enough water will feel the consequences. Dehydration is an especially big problem in hot climates where your cat’s warm fur coat might work against them, but it doesn’t just happen on hot days. Every cat owner should watch out for signs of dehydration.

divider cat faces 2 oct 2024

How to Tell If Your Cat Is Dehydrated

1. Panting

a tabby cat panting on hot weather
Image Credit: Sari ONeal, Shutterstock

Dogs and cats pant to cool their bodies by exposing their wet tongues and mouths to the air. Although dogs pant after exercise, cats usually only pant when dehydrated, struggling to breathe, or overheating. If you see your cat panting, there’s a good chance they aren’t getting enough water. Panting is usually one of the most obvious signs that something’s not right, so if you see a cat panting, you can check for other signs of dehydration.


2. Skin Tenting

The “skin test” is a strange but accurate way to tell if your cat’s getting enough water. Cats have stretchy, supple skin when they are healthy, but it becomes stiff during dehydration. To perform a skin test, pinch the loose skin between your cat’s shoulder blades and pull it up 2 or 3 inches until it looks almost like a tent.

Then let it go. If the skin snaps back to normal within a second or so, you’re good! But if it takes several seconds to return to normal or the “tent” stays sticking up, your cat is likely dehydrated. The longer it takes your cat’s skin to normalize, the more serious it is.


3. Dry Gums

Veterinarian checks teeth to a big maine coon cat at vet clinic
Image Credit: Ermolaev Alexander, Shutterstock

Another way to tell if your cat is dehydrated is by looking at their gums. Try pulling up their lip to see what the gums above their teeth look like. Healthy cats have pink gums that are moist and slippery, just like a person’s gums. Dehydrated cats have white or gray gums that are dry or sticky to the touch.


4. Sunken Eyes

As cats become dehydrated, they lose luster in their eyes, and the skin around them sags. Bright, alert eyes are a sign of a healthy cat, while dull, sunken eyes can indicate dehydration or illness. If your cat has sunken eyes and other dehydration signs, they must be taken to the veterinarian promptly.


5. Sweaty Paws

Just like panting helps cats cool off, sweat can indicate your cat is overheating. Sweat can also speed up the dehydration process by removing water from the body when your cat can’t spare it. Cats don’t sweat all over, but you can check their paws to see if they’re sweating. Leaving wet paw prints behind despite dry feet or damp paws might be a sign that your cat is overheating.


6. Refusal to Eat

kitten not eating
Image Credit: Happy monkey, Shutterstock

If your cat feels bad, they might react by refusing to eat. Dehydration can cause nausea and appetite loss as the body struggles to function without water. A decreased appetite can signify many problems, so you shouldn’t jump straight to dehydration. But if your cat shows other signs of needing water and refuses to eat, it might be a sign that the condition is serious.


7. Lethargy

sick cat lying on blanket
Image credit: one photo, Shutterstock

Another sign of dehydration is a lack of energy. It can be hard to diagnose because cats like to nap during hot days and conserve energy, but lethargy often goes beyond laziness. If your cat struggles to move or eat, they might not be drinking enough water.


8. Stool Changes

cat pooping on the street
Image Credit: Pathara Sanjou, Shutterstock

One more way to check for dehydration is to check the litter box. Dehydration and constipation often go hand in hand. You might see hard, dry feces and a lack of urine in the litterbox. Dehydration caused by an illness can swing the other way, leading to diarrhea, vomiting, and excessive urination that purges water from the system.

divider cat faces 2 oct 2024

What Makes Cats Dehydrated?

Overheating and heat stroke are some of the most common causes of dehydration. A lack of available water or an aversion to the water can also contribute to dehydration.

Sometimes, dehydration is a sign of an underlying problem. Illnesses that cause vomiting can lead to dehydration, and some disorders that cause excessive urination, like untreated diabetes or kidney problems, can also cause dehydration. In those cases, your cat is probably drinking enough water, but it just passes through the system too quickly to fully hydrate your cat.

Treating Cat Dehydration

In minor cases of dehydration, the most important thing is to help your cat get more fluids into their system. Provide plenty of clean, fresh water, and use a wide, shallow bowl. Some cats avoid water because it is too close to their litter box or because it doesn’t get changed frequently enough. Adding a few ice cubes on hot days can help it stay cool all day.

Some cats also struggle to drink enough water because their bodies expect to get moisture from food. Switching to a wet food or adding some chicken broth or a wet topper to their dry food can help.

divider cat faces 2 oct 2024

Final Thoughts

If your cat is already dehydrated or drinking lots of water doesn’t seem to alleviate the signs, take them to a vet. Your vet can give your cat an IV containing fluids to keep them hydrated until they’re recovered or until the underlying issue is diagnosed. With the proper treatment, dehydration is simple to reverse.


Featured Image Credit: Natata, Shutterstock

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.


Catster's Digital Magazine is Back!

Vet-approved health & behavior advice

Real cat stories & community features

Chatting About the Importance of Spaying/Neutering, Cat Retail Shopping Ban & Red-Level Storms | Chatty Cattys, Episode 30

In this episode of Catster’s Chatty Cattys podcast, Nicole and Dr. Karyn are celebrating a major legal win for pets before diving into...

Is Your Cat Happy? Here’s How You Can Tell

Cats have a reputation for being indifferent, even inscrutable. But despite their seemingly ambivalent appearance, cats experience many emotions, including happiness, and they...

Human Brains Age Like Cats – New Study Debunks the 7-Year Rule

If you’ve ever caught your senior cat staring blankly at a wall, wandering the halls at 3 am, calling out for no clear...

Chatting with Devin About Here! Have a Kitten, Fostering, & Why Two Are Better Than One | Chatty Cattys, Episode 29

In this episode of Catster’s Chatty Cattys podcast, Nicole & Dr. Karyn sit down with Devin, the founder and one-woman show behind “Here...

More related

Can Cats Eat PopTarts? Vet-Reviewed Facts & FAQ

“Curiosity killed the cat” is a phrase that couldn’t be truer about some cats. It seems like you can’t leave them alone for...

245 Asian Cat Names: Korean, Japanese, Chinese Inspired Ideas

Naming your new pet is a big undertaking. This will be the name that your kitty has for the rest of their life...

Catster Photo Contest: Cats of the Week Winners (October 23, 2025)

Every week our team gets the privilege of sorting through our readers photos to choose what cats will win this weeks contest! See...

Are Ragdoll Cats Hypoallergenic? Breed Facts & Allergies Tips

Cute, cuddly, and super calm, Ragdoll cats make excellent kitty companions for almost anyone. With fluffy fur and a docile personality, the Ragdoll...

Keep reading

Can a Cat Hear Better Than a Dog? Vet Approved Differences & Comparison

Cats and dogs often get compared to each other, and many people engage in heated debates to determine which pet is better than the other. When it comes to the arena of hearing, science has proven that cats generally have...

dog and cat checked by vet

Why Do Cats Stretch Their Claws? 7 Vet Reviewed Reasons & Tips

If you’ve been around cats, it’s evident they’re closer to their wild roots than dogs. While humans welcomed canines into their lives up to 40,000 years ago,1 it took us longer to warm up to felines, with domestication going back...

cat paws and sharps claws

Is Prescription Cat Food Necessary? Vet-Verified Health & Nutrition Facts

There are so many types of cat food on the market, and a glance at the cat food section in a pet store proves this. With so many options, you might be confused as to which foods are truly good...

close up doctor filling up a prescription form

Can Cats Eat Potato Chips? Vet-Verified Nutrition & Health Advice

You settle down in front of the TV, open your bag of potato chips, and crunch your way through your favorite salty snack. However, your cat is sitting at your feet giving you “Puss n’ Boots” eyes and you wonder...

Can Cats Eat Potato Chips

Why Did My Cat Poop on My Bed? 8 Possible Reasons & Solutions

If you’re ready to hit the hay, the last thing you want to deal with is a fresh pile of cat poop on your bed. But you’re probably here because your sweet kitty has been using your sleeping space as...

Black Sphynx cat lying on the bed

Why Does My Cat Take My Spot? 5 Vet-Verified Reasons

When you became a cat parent, you probably didn’t expect to regularly give up your comfortable seat. Many cats have a knack for stealing our seats, whether it is the hard dining chair or couch. Getting up from your seat...

Scottish Shorthair cat lying on a velvet couch

Why Do People Hate Cats? What Science Tells Us (Vet-Reviewed)

Cat lovers think that their favorite animals can generally do no wrong. People who adore felines often find them loving, attentive, playful, and adaptable. They love cats’ independence and sweet companionship and feel honored that such self-sufficient and intelligent creatures...

red flame point siamese in the grass

Can Cats Eat Cake? Vet-Reviewed Risks & Facts

Cats are adorable. We understand why you’d want to share a piece of cake with your kitty. Since cakes are often found in the kitchen, your cat may have had some. So, is cake bad for cats? While a small...

Can Cats Eat Cake

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.