Puppy drinking a lot: what it can mean
A puppy drinking noticeably more than usual is often down to something simple — warm weather, extra exercise, a recent switch to dry food, or a bit of stress — but increased thirst can also be an early sign of infection, kidney issues or other conditions that need veterinary attention. Because the harmless causes and the ones that matter look identical from the outside, a puppy drinking a lot for more than a day or two is always worth having checked.
Get this seen
This is worth a call to your vet rather than waiting to see how it goes, particularly if it has lasted more than a day or your pet is otherwise off-colour.
Everyday reasons a puppy drinks more
Hot weather, a longer walk than usual, or excitement and play can all increase a puppy's thirst temporarily and harmlessly, in much the same way it would for a person. A recent change from wet to dry food also increases water intake, simply because dry kibble contains far less moisture than a wet or tinned diet.
Some puppies also drink more out of habit or boredom, particularly if water is left down constantly and easily accessible, though this is usually a mild and consistent increase rather than a sudden, marked change.
When increased thirst points to something else
A sudden, significant increase in drinking, especially alongside more frequent urination, accidents in a previously house-trained puppy, weight loss, or a change in appetite, is a different picture from the everyday causes above and points towards something that needs investigating.
Urinary infections, some congenital kidney or liver conditions, and hormonal issues can all present with increased thirst in young dogs, and none of these can be ruled in or out without a vet examining your puppy and likely running some simple tests.
When to see a vet
See a vet within a day or two if increased drinking continues beyond what a hot day or extra exercise would explain, or sooner if it's accompanied by lethargy, vomiting, diarrhoea, a swollen abdomen or a puppy who seems generally unwell.
Ring your vet straight away if your puppy is drinking excessively and also seems weak, is not eating, or you notice their gums looking pale — these combined signs mean it's worth getting seen urgently rather than waiting to see if it settles.
It also helps to make a rough note of how much your puppy is actually drinking and for how many days this has been going on before your appointment, since a vet will usually ask about the pattern and timing, and a clear answer speeds up working out what's going on.
What a vet visit usually involves
A vet will typically start with a general physical examination, checking hydration, weight and overall condition, before deciding whether further tests are needed. A urine sample is often the first and simplest test, since it can quickly point towards an infection or give clues about kidney function.
Depending on what the examination and urine sample show, your vet may suggest blood tests to look more closely at kidney and liver function, or at hormone levels, since a handful of hormonal conditions in young dogs can also present with increased thirst alongside other symptoms.
Most causes of increased drinking in puppies, once properly diagnosed, are manageable, and many resolve completely with straightforward treatment such as antibiotics for an infection. The value of an early vet visit is mainly in finding out which cause you're dealing with quickly, rather than the visit itself being something to worry about.
Try not to delay a check-up out of worry about what it might turn out to be — in practice, the everyday explanations are far more common than anything serious, and getting a clear answer either way is more useful than sitting with uncertainty.
What can help
Things we stock that owners commonly use alongside a vet’s advice — not a substitute for it.
MPS Head Cover — Breathable Dog Head & Ear Protector
A comfortable, breathable alternative to the cone of shame — protects head and ear wounds or bandages while letting your dog move freely.
From£5.99
Leucillin Antiseptic Skincare Spray for Cats & Dogs
A versatile, alcohol-free antiseptic spray that cleans, soothes, and helps protect your pet's skin from bacteria, viruses, and fungi.
From£7.99
Absorbent Cotton Gauze Swabs for Pets – Pack of 100
Highly absorbent, low-lint cotton gauze swabs produced in clean conditions — a practical first-aid essential available in three size and ply combinations.
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LickiMat OH Bowl for Dogs — Slow Feeder with Tongue-Cleaning Tips
A vet-developed dog feeding bowl with raised rubber tips that clean the tongue as your dog licks — calming, dishwasher safe, and available in three sizes.
From£12.99
Common questions
- How much water should a puppy normally drink?
- It varies with size, activity and diet, but a general guide vets sometimes use is roughly 50ml per kilogram of body weight per day, though this is only a rough figure and shouldn't be used to diagnose anything on its own — your vet is best placed to say what's normal for your puppy.
- Can teething cause a puppy to drink more?
- It isn't a typical direct cause, though a teething puppy chewing more, drooling, or eating slightly differently can sometimes coincide with a small change in drinking habits. A marked increase is still worth mentioning to your vet rather than assuming it's teething.
- Is it normal for a puppy to drink a lot after exercise?
- Yes, drinking more after a walk or play session, especially in warm weather, is completely normal and usually settles quickly once your puppy has rested and rehydrated.
- What tests might a vet run for a puppy drinking too much?
- A vet will typically start with a physical examination and may recommend a urine sample or blood tests to check for infection, kidney function or other underlying causes, depending on what else they notice during the check-up.
- Can a change in diet make a puppy drink more water?
- Yes, switching from a wet or tinned diet to a dry kibble is a common and harmless reason for increased water intake, simply because dry food contains far less moisture. This kind of increase is usually mild and steady rather than sudden or dramatic.
- Does breed affect how much a puppy naturally drinks?
- There's some variation between breeds and individual dogs, and larger, more active breeds will generally drink more in absolute terms than a small, sedentary one. The more useful comparison is against your own puppy's usual pattern rather than a fixed number, since what's normal varies from dog to dog.
Related
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Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.