How Much Water Does Your Dog Really Need?
May 27, 2025 | By Ashleigh Tosh
Water is the most vital nutrient in your dog's diet. Yes, it's even more important than protein, fat, or even vitamins, yet it's often the one we think about the least.
Most of us dog owners keep a full bowl topped up and hope our pups use their initiative to drink it up. But how much should your dog actually be drinking each day? Can they drink too much? And what if they seem to ignore their water bowl altogether?
Sounds bizarre but it can happen!
So, let's break it all down: from how to estimate your dog's daily needs to spotting early signs of dehydration (or overhydration) - and what you can do to keep them hydrated without fuss.
Table of Contents
How Much Water Should Your Dog Drink Each Day?
 As a general rule of thumb, your dog will need around 50 to 100 millilitres of water per kilogram of body weight every day.
That means a 10kg dog would need roughly 500 to 700ml of water, while a 30kg dog might need up to 2 litres. It's not an exact science - some dogs will naturally drink a little more, others a little less - but these figures give you a good baseline to work from.
Of course, this isn't set in stone.
Just like humans, a dog's water needs change depending on what they eat, how active they are, the weather, and even their age or breed.
What Affects Your Dog's Water Intake?
Dog food and hydration
We talk a lot about your dog's diet and food preferences here at All About Dog Food, and unsurprisingly their diet is one of the biggest factors when it comes to your dog's water intake too!
You see, dogs who eat dry kibble get very little moisture from their food - only about 10% - so they'll naturally need to drink more from their bowl to stay hydrated.
On the other hand, dogs fed raw, fresh, or wet food (which can be up to 80% moisture) often drink far less. That doesn't mean they're dehydrated - they're just getting their fluids from their food instead.
Activity levels
Yes, how active your dog is can have a huge impact on how much water they need to be drinking to stay in peak health.
After a long walk, a play session, or even a hot day in the sun, your dog will naturally need more water to replace what's lost through panting and exertion.
The weather
The same can be said for warmer weather too, especially for dogs with thick coats or short muzzles as they can often struggle to regulate their body temperature. This means they may need more fluid to help cool down.
Age, breed and overall health
Puppies, senior dogs, and nursing dams all tend to have higher hydration needs.
Similarly, dogs with health conditions like kidney disease or diabetes may drink significantly more than what is considered "normal," so if you notice your dog suddenly starts drinking excessively or barely drinks at all, it's worth checking in with your vet.
Signs of Dehydration and Overhydration in Dogs
 We know now that there are many factors that can impact how much water your dog may need, but how can you tell if your dog isn't drinking enough or, in rare cases, too much?
Dehydration in dogs
Mild dehydration can be surprisingly subtle at first.
You might notice that your dog's gums feel dry or sticky rather than moist.
Their skin may lose its elasticity - if you gently pinch the skin between their shoulders, it should spring back straight away. If it stays tented or takes time to settle, they may be dehydrated.
Other signs can include lethargy, dark or concentrated urine, and sunken eyes.
Severe dehydration can be very dangerous and may even require immediate veterinary intervention, particularly if your dog becomes weak or collapses.
Overhydration in dogs
On the flip side, overhydration - though uncommon - can happen, particularly in dogs that gulp down excessive water during play, swimming, or due to obsessive drinking habits.
If your dog drinks too much water, it may lead to something called water intoxication or hyponatremia. This condition will dilute the body's sodium levels and lead to bloating, vomiting, confusion, unsteadiness, and in very serious cases, seizures.
It's rare but serious, so if your pup enjoys water play or spending a lot of time in rivers or lakes, it's always worth monitoring your dog's fluid intake.
How to Encourage Your Dog to Drink More
It may come as a bit of a shock, but not all dogs like to drink water!
So, if yours tends to ignore their bowl, there are a few tricks you can employ to make water more appealing and keep them well hydrated.
First, start with the basics...
Make sure water is always clean, fresh, and available in more than one place around your house. Some dogs don't like the smell or taste of stale water, especially in plastic bowls. Stainless steel or ceramic can be a better option, and cleaning bowls daily is a must for fussy drinkers.
You can also make drinking more inviting by adding a splash of flavour - a little low-salt bone broth, or the water from a tin of fish (in spring water, not brine), can make a big difference. Just make sure it's free from oils or excessive salt to keep the water balance right.
They may sound novel, but water fountains can work wonders for some dogs, particularly those that prefer moving water. And in warmer months, ice cubes or frozen treats made from diluted broth can provide a refreshing way to increase fluid intake.
You can even help keep them hydrated by feeding them high water foods like cucumbers and watermelon. These can even be frozen into tasty snacks for your pup.
Last but not least - take a look at their diet.
As we said before, dogs on a dry diet tend to need more water throughout the day, but if your dog turns its nose up at the water bowl rather than lapping it up, you might want to consider switching to a higher moisture food like wet, fresh, or raw.
If that's out of the question, though, you could also add a little water to the dry food to give it a little hydrating boost.
In Conclusion - Keeping Your Dog's Hydration in Check
While the numbers can be useful, the best way to stay on top of your dog's hydration is by simply monitoring it daily.
You'll quickly get to know what's normal for them - how often they drink, how much, and when. Changes in behaviour are often the first clue that something isn't right.
Keep an eye on their water bowl, their urine output, and their general energy levels. And if you're ever unsure whether your dog is drinking too little or too much, it's always worth getting professional advice.
About the author
 Ashleigh Tosh - Content Writer at All About Dog Food
Ashleigh's a professional writer with over a decade’s experience, including several years focused on human nutrition and the fitness industry. That extensive understanding of ingredients and health translated naturally into her passion for dog nutrition, sparked when her late Dogue De Bordeaux developed digestive issues. Now a Content Writer for All About Dog Food, she's delighted to help dog owners all over the UK make informed choices for their pups. She lives with Frank, her lively Rottweiler, and credits his energy and very shiny coat to a great diet, and plenty of play (he's a big fan of tug-o-war).
Frequently Asked Questions
My dog barely drinks but eats wet food – should I be worried?
Not necessarily. Wet and raw foods contain a lot of moisture, so your dog may simply be getting their fluids through their meals. If they seem bright and healthy and are peeing regularly, they’re likely well hydrated.
What should I do if my dog is drinking more than usual?
Excessive thirst could indicate an underlying health issue such as diabetes or kidney disease. Always consult your vet if your dog’s drinking habits change suddenly or significantly.
Can I give my dog flavoured water or electrolyte drinks?
Avoid human sports drinks – they often contain sugars, caffeine or sweeteners like xylitol, which are toxic to dogs. If you want to encourage hydration, stick with plain water or add a little dog-safe bone broth for flavour.
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