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

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.

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!

Preventative wellness PGV mention keep cat healthy Preventative wellness PGV mention keep cat healthy mobile

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.

Not every cat water fountain will make your life easier. This is why we recommend the well-designed Hepper Stainless Steel Cat Water Fountain, which has advanced triple filtration, three different flow modes, and an automatic shutoff feature.

Hepper Stainless Steel Cat Water Fountain
  • Premium 304-Grade Stainless Steel - This metal cat water fountain is hygienic, with superior...
  • Serene & Healthy Cat Drinking Fountain Experience - With whisper-quiet pumping & an advanced...
  • Say Goodbye to Dehydration - Provide your cat with a constant source of flowing water with this...

This modern, minimalist fountain runs surprisingly quietly and is very easy to clean.

At Catster, we’ve admired Hepper for many years and decided to take a controlling ownership interest so that we could benefit from the outstanding designs of this cool cat company!

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.


Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Roundworms in Cats: Causes, Signs & Care (Vet Answer)

If you own a cat, you do need to be aware of them getting worms. Worms are not pleasant to think about, but...

Why Are Cats Weird About Water? 5 Reasons Why Their Behavior Is Strange

Cats seem to have a complicated relationship with water. They may hate getting baths, but they’ll still have fun playing with water running...

How Many Cats Can You Own in New Jersey in 2026? Facts & FAQ

As a cat parent, you are tempted to adopt every stray cat you see. Sadly, of course, you know that it’s just not...

6 Pet-Friendly Hotels In Charleston, SC (2026 Update)

If you plan to visit the numerous Charleston sites soon, you will probably spend all your extra time planning. If you want to...

More related

How to Give a Cat a Flea Bath Without Getting Scratched: 3 Vet-Verified Tips

Any cat can get fleas from time to time, even indoor kitties. If you catch your cat scratching or you spot any signs...

Tidy Cats Breeze Cat Litter System Review: Recalls, Pros & Cons

Review Summary Cat owners always look for innovative ways to simplify the litter box process. If you ask anyone, their least favorite part...

Are Air Plants Toxic to Cats? Vet-Reviewed Houseplants

We love our cats, and we want what’s best for them. So, when it comes to choosing houseplants, we want to make sure...

Cats on Sailboats: How Safe Is It? Vet-Reviewed Considerations & Safety Tips

Some people really like to push the envelope when it comes to their cats. The increasing number of people who are training their...

Keep reading

8 Best Automatic Cat Feeders in Canada in 2026 – Reviews & Top Picks

Automatic cat feeders are a convenient way to feed your cat. They might seem like gadgets designed for lazy cat owners, but they can actually be very helpful. Cats do best when fed on a schedule, and automatic feeders can...

cat eating food from automatic feeder

Can Cats Eat Gingerbread? Vet-Approved Facts & FAQ

Gingerbread is a tasty holiday treat that people around the world enjoy. The sweetness and the zing of ginger produce a unique flavor profile. Unsurprisingly, you might want to share some gingerbread with your cat! Not only does gingerbread taste...

Can Cats Eat Gingerbread

Why Do Cats Arch Their Back? 5 Vet-Verified Reasons for this Behavior

Cats have limber bodies and can squeeze through the smallest gaps. They can also arch their back in ways that seem impossible, but have you ever wondered why cats arch their backs? Is there a particular reason for the behavior?...

siamese cat arch his back

Are Fiddle-Leaf Figs Toxic to Cats? Vet-Reviewed Houseplants Examined

With over 400,000 different land plant species on our beautiful green planet, indoor plants have become extremely popular. 1 Plants clean the air that you live in, are low maintenance, reduce noise, look nice, and add life to any space....

Catster_Are Are Fiddle-Leaf Figs Toxic to Cats

How to Stop My Cat From Peeing on My Bed: 8 Vet-Verified Tips & Tricks

Picture this scene: you’re home after a long day at work and finally ready to slip into bed and head off to dreamland. You throw the covers back, only to find a large wet spot; your cat has peed on...

Cat sitting near wet or piss spot on the bed

Purina Pro Plan vs Purina One Cat Food: 2026 Comparison

Purina is a company that makes a wide range of pet food products for cats and dogs, and we are going to take a look at two of their most popular cat food lines, Purina Pro Plan and Purina One,...

Purina Pro Plan VS Purina One

How to Get Your Cat to Cuddle: 5 Vet-Approved Tips for Better Bonding

It’s most cat owners’ dreams to have a cute and cuddly cat that sits on their laps and curls up with them in bed, but this isn’t always the case. Like humans, cats have unique personalities, and while some cats...

cat enjoying cuddle

Pet Poison Prevention Week: When It Is & Vet Approved Safety Tips

National Animal Poison Prevention Week (NAPPW) is an annual event that occurs during the third full week in March, and in 2024, it runs from March 17 to 23. The event is designed to educate pet owners on the substances...

cat with pill bottle

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.