--- title: "How to tell if your dog or cat is dehydrated" id: "6629" type: "post" slug: "how-to-tell-if-your-dog-or-cat-is-dehydrated" published_at: "2026-08-28T07:28:36+00:00" modified_at: "2026-08-28T08:30:15+00:00" url: "https://rspcapetinsurance.org.au/pet-talk/how-to-tell-if-your-dog-or-cat-is-dehydrated/" markdown_url: "https://rspcapetinsurance.org.au/pet-talk/how-to-tell-if-your-dog-or-cat-is-dehydrated.md" excerpt: "Dehydration in dogs and cats can happen more quickly than many pet parents realise, particularly during hot weather or when your pet is feeling unwell. Because our pets can’t tell us when something’s wrong, knowing the possible signs to watch..." taxonomy_category: - "Care & training" --- [Pet Talk](https://rspcapetinsurance.org.au/pet-talk/) [Care & training](https://rspcapetinsurance.org.au/pet-talk/category/care-and-training/) How to tell if your dog or cat is dehydrated Care & training # How to tell if your dog or cat is dehydrated Written by our RSPCA Pet Insurance Team 28 Aug, 2026 - 8 min read Dehydration in dogs and cats can happen more quickly than many pet parents realise, particularly during hot weather or when your pet is feeling unwell. Because our pets can’t tell us when something’s wrong, knowing the possible signs to watch out for can help you act sooner and get them the care they need. There are two simple checks you can do at home in under a minute (the skin-pinch test and the gum test) that may help you look for possible signs of dehydration. While these checks aren’t a substitute for a vet examination, they can be a useful first step if you’re wondering whether your dog or cat may be dehydrated. In this blog, we’ll explore these at-home checks, possible signs of dehydration in dogs and cats, some of the most common causes of dehydration, and when to contact your vet for advice. **Table of contents** - [Simple at-home checks for possible signs of dehydration](#simple-at-home-checks-for-possible-signs-of-dehydration) - [Common signs of dehydration to look out for](#common-signs-of-dehydration-to-look-out-for) - [Common causes of dehydration in dogs and cats](#common-causes-of-dehydration-in-dogs-and-cats) - [When to contact your vet for advice](#when-to-contact-your-vet-for-advice) - [How RSPCA pet insurance can help with dehydration treatment](#how-pet-insurance-can-help-with-dehydration-treatment) ## Simple at-home checks for possible signs of dehydration If you’re worried your dog or cat might be dehydrated, there are two simple at-home checks that may help you identify possible signs of dehydration. ### Skin-pinch (skin tent) test Gently lift a fold of loose skin at the back of the neck or between the shoulder blades, then let it go. In a well-hydrated pet, the skin will generally spring back into place within one to two seconds. If the skin stays ‘tented’ or returns slowly, it may be a sign of dehydration. ### Gum test Healthy gums in a well-hydrated pet should be pink, moist, and slippery to the touch. Dry or ‘tacky’ gums can be a sign of dehydration. If your pet is comfortable having their mouth handled, you can also gently press a finger against their gum until it briefly turns white, then release. The pink colour should return within about two seconds. If it takes longer, it may be another sign that your pet could be dehydrated and should be assessed by a vet. It’s important to remember that while these tests can give a useful indication about your pet’s hydration status, neither can diagnose dehydration on their own. While these checks are useful, they’re not foolproof. Older pets, very lean animals, or breeds with looser skin can show a slower skin response even when they’re well hydrated, which can make the skin pinch test more difficult to interpret. Think of these tests as a guide rather than a diagnosis. They can help identify possible signs of dehydration but can’t confirm whether your pet is dehydrated. If you’re ever unsure, contact your vet for advice. ## Common signs of dehydration to look out for Alongside the skin and gum tests, be sure to keep an eye out for these common signs that may indicate dehydration in dogs and cats: - Lethargy or noticeably lower energy than usual - Loss of appetite - Sunken-looking eyes - Thick, ropey saliva - Reduced urination, or urine that’s darker or more concentrated than usual - Panting that doesn’t settle, particularly in dogs These signs can be associated with dehydration, particularly when they occur alongside changes in skin elasticity or dry, tacky gums. However, it’s also worth remembering that these signs aren’t exclusive to dehydration and can sometimes indicate an underlying illness that requires vet attention. If your pet seems unusually tired, refuses food, or you’re concerned that something isn’t right, it’s best to contact your vet for advice. ## Common causes of dehydration in dogs and cats Dehydration in dogs and cats happens when they lose more fluids than they take in. Sometimes it can result from not drinking enough water, particularly during hot weather, but it can also be a sign of an underlying health problem that requires vet attention. Some of the most common causes of dehydration in pets include: - **Not drinking enough water** Hot weather, unfamiliar surroundings, illness, stress, or limited access to fresh, clean water can all reduce your pet’s water intake. - **Heat stress and heatstroke** As your pet pants to cool down, they lose more fluid. If they can’t replace those fluids quickly enough, dehydration can develop. Heatstroke is a medical emergency. If you suspect your pet may be suffering from heatstroke, contact your vet immediately. For more tips on keeping your dog safe in warm weather, see our guide on [how to protect your dog or cat from heatstroke](https://rspcapetinsurance.org.au/pet-talk/heatstroke-in-dogs-and-cats/) . - **Vomiting and diarrhoea** These can cause rapid fluid loss and lead to dehydration, particularly if symptoms continue for more than a short time. - **Underlying health conditions** Diseases such as chronic kidney disease, diabetes, and, in cats, hyperthyroidism can all increase the risk of dehydration. - **Certain medications** Some medicines, including diuretics, can increase fluid loss and make dehydration more likely. Hot weather is a common cause of dehydration, which is why it’s worth paying a little extra attention to your pet’s hydration during the warmer months. Making sure fresh water is always available, providing plenty of shade, and watching for the early signs of dehydration can all help keep your pet safe. Some pets may also be encouraged to drink more by offering pet-safe frozen treats, adding small amounts of water to their usual food, or using small amounts of pet-safe, low-salt fish or chicken broth to increase the appeal of their drinking water. ## When to contact your vet for advice If you’re concerned that your dog or cat may be dehydrated, it’s important to know when to seek vet advice. It’s time to contact your vet promptly, or visit an emergency vet clinic, if your dog or cat has any of the following: - Skin that remains tented or returns slowly after the skin-pinch test - Tacky, pale, or blue-tinged gums - Lethargy, along with reduced or no urination - Repeated vomiting or diarrhoea - Collapse, disorientation, or suspected heatstroke - Any other unusual changes in behaviour Puppies, kittens, senior pets, and pets with existing health conditions can become dehydrated more quickly and may require urgent vet attention sooner. If you’re ever unsure whether your pet needs to be seen, it’s always safest to contact your vet for advice. Remember, the skin-pinch and gum tests are helpful screening tools, but they shouldn’t be used to diagnose or confirm dehydration on their own. A vet can properly assess your pet’s hydration status, check for any underlying illness, and recommend the most appropriate treatment. ## How pet insurance can help with dehydration treatment Dehydration can develop for a range of reasons, from hot weather and gastrointestinal upset, to underlying medical conditions such as kidney disease or diabetes. Depending on the cause and severity, vet treatment may include fluid therapy and management of any underlying illness. If your pet needs treatment for an eligible condition that has caused or contributed to dehydration, [RSPCA Pet Insurance](https://rspcapetinsurance.org.au/pet-insurance/) may be able to help with the cost of vet care. With cover you can customise to your pet and budget, and every policy contributing to vital RSPCA animal welfare initiatives, it’s protection with purpose. For your own pet and thousands of others across Australia. To learn more about how RSPCA Pet Insurance could support you and your pet, [click here](https://rspcapetinsurance.org.au/pet-insurance/) . Or, if you’re ready to take the next step, you can fetch a commitment-free pet insurance quote [online](https://quote.rspcapetinsurance.org.au/) . ### **Disclaimer** As with any insurance, terms, conditions, and exclusions apply. Please read the [Product Disclosure Statement](https://rspcapetinsurance.org.au/product-disclosure-statement/) to make sure this cover suits your needs. **References** [1] RSPCA Australia. *How can I protect my dog from heatstroke?* RSPCA Knowledgebase. Available from: [https://kb.rspca.org.au/categories/companion-animals/dogs/caring-for-my-dog/how-can-i-protect-my-dog-from-heatstroke](https://kb.rspca.org.au/categories/companion-animals/dogs/caring-for-my-dog/how-can-i-protect-my-dog-from-heatstroke) [2] RSPCA Australia. *What can I do to protect my companion animals from heatstroke?* RSPCA Knowledgebase. Available from: [https://kb.rspca.org.au/categories/companion-animals/pet-ownership/what-can-i-do-to-protect-my-companion-animals-from-heatstroke](https://kb.rspca.org.au/categories/companion-animals/pet-ownership/what-can-i-do-to-protect-my-companion-animals-from-heatstroke) [3] Cornell University College of Veterinary Medicine. *Hydration.* Available from: [https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information/feline-health-topics/hydration](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information/feline-health-topics/hydration) [4] National Library of Medicine. *EMS Canine Evaluation and Treatment of Dehydration.* Available from: [https://www.ncbi.nlm.nih.gov/books/NBK597364/](https://www.ncbi.nlm.nih.gov/books/NBK597364/) [5] AVMA Publications. *Evaluation of skin turgor and capillary refill time as predictors of dehydration in exercising dogs.* Available from: [https://avmajournals.avma.org/view/journals/ajvr/80/2/ajvr.80.2.123.xml](https://avmajournals.avma.org/view/journals/ajvr/80/2/ajvr.80.2.123.xml) [6] Merck Veterinary Manual. *The Fluid Resuscitation Plan in Animals.* Available from: [https://www.merckvetmanual.com/therapeutics/fluid-therapy/the-fluid-resuscitation-plan-in-animals](https://www.merckvetmanual.com/therapeutics/fluid-therapy/the-fluid-resuscitation-plan-in-animals) [7] Veterinary Partner (VIN). *Dehydration: First Aid.* Available from: [https://veterinarypartner.vin.com/default.aspx?pid=19239&id=4951322](https://veterinarypartner.vin.com/default.aspx?pid=19239&id=4951322) [8] PetMD. *How to Give Subcutaneous Fluids to Dogs and Cats.* Available from: [https://www.petmd.com/general-health/how-give-subcutaneous-fluids-dogs-and-cats](https://www.petmd.com/general-health/how-give-subcutaneous-fluids-dogs-and-cats) [9] RSPCA Australia. *How can I create low-cost DIY enrichment for my cat or dog?* RSPCA Knowledgebase. Available from: [https://kb.rspca.org.au/categories/companion-animals/dogs/caring-for-my-dog/how-can-i-create-low-cost-diy-enrichment-for-my-cat-or-dog](https://kb.rspca.org.au/categories/companion-animals/dogs/caring-for-my-dog/how-can-i-create-low-cost-diy-enrichment-for-my-cat-or-dog) ## FAQs ### How can I tell if my dog is dehydrated at home? If you’re wondering how to tell if your dog may be dehydrated, there are two simple checks you can do at home to look for possible signs of dehydration. Try the skin-pinch test by gently lifting a fold of skin over your dog’s shoulders or scruff. In a well-hydrated dog, it should generally spring back within one to two seconds. You can also check their gums, which should be pink and moist rather than dry or tacky. Along with these checks, keep an eye out for other signs of dehydration, such as lethargy, a reduced appetite, and urinating less than usual. If you’re at all concerned, contact your vet for advice. ### What does it mean if my dog’s skin doesn’t spring back when I do the skin-pinch test? If your dog’s skin stays ‘tented’ or takes longer than one to two seconds to return to normal when you do the skin-pinch test, it may be a sign of dehydration. This happens because dehydration can reduce the skin’s elasticity. The skin-pinch test is generally most reliable in younger dogs with a healthy body condition. Older dogs, very thin dogs, or breeds with looser skin may show a slower response even when they’re well hydrated, so this test should always be treated as a possible indicator of dehydration rather than a definitive diagnosis. If you’re concerned that your dog may be dehydrated, it’s always best to contact your vet for advice. ### How can I tell if my cat is dehydrated? To look for signs of possible dehydration, try the skin-pinch test over the shoulders, and watch for sunken-looking eyes. A dehydrated cat may also seem more tired than usual, eat less, hide more often, or produce less urine. If you’re concerned about your cat’s hydration or any changes in their behaviour, it’s always best to contact your vet for advice. ### What are the most common causes of dehydration in dogs and cats? Dehydration in dogs and cats can happen when they lose more fluids than they replace. Common causes can include not drinking enough water, hot weather and heatstroke, vomiting or diarrhoea, and underlying health conditions such as chronic kidney disease, diabetes and, in cats, hyperthyroidism. ### When should I take my dehydrated dog or cat to the vet? Contact your vet if you’re concerned that your pet may be dehydrated, particularly if their skin stays tented after the skin-pinch test, their gums are tacky or pale, they’re vomiting, lethargic, have diarrhoea, or they’re urinating less than usual. Puppies, kittens, senior pets, and pets with existing health conditions can become dehydrated more quickly, so they should be assessed by a vet sooner rather than later. If you’re ever unsure whether your pet may be dehydrated, contact your vet for advice. If your dog or cat needs vet treatment for an eligible condition that has caused or contributed to dehydration, [RSPCA Pet Insurance](https://rspcapetinsurance.org.au/pet-insurance/) may be able to help with the cost of treatment. With cover you can customise to your pet and budget, and every policy contributing to vital RSPCA animal welfare initiatives, it’s protection with purpose. For your own pet and thousands of others across Australia. To learn more, visit the RSPCA Pet Insurance [website](https://rspcapetinsurance.org.au/pet-insurance/) or get a commitment-free quote [online](https://quote.rspcapetinsurance.org.au/) . As with any insurance, terms, conditions, and exclusions apply. Please read the [Product Disclosure Statement](https://rspcapetinsurance.org.au/product-disclosure-statement/) to make sure this cover suits your needs. [See more](https://rspcapetinsurance.org.au/faqs/) ## Related blogs [Why does my dog have bad breath? Aug 2026 - 7 min read Read blog](https://rspcapetinsurance.org.au/pet-talk/why-does-my-dog-have-bad-breath/) [Understanding dog allergies: signs, types, and how to manage them Aug 2026 - 7 min read Read blog](https://rspcapetinsurance.org.au/pet-talk/understanding-dog-allergies/) [How to trim your dog or cat’s nails safely Aug 2026 - 10 min read Read blog](https://rspcapetinsurance.org.au/pet-talk/how-to-trim-your-dog-or-cats-nails-safely/)