Why Is My Puppy Drinking So Much Water? 7 Reasons That Might Surprise You

September 30, 2025 |

Have you ever watched your furry little friend lap up water like there’s no tomorrow and wondered, “Why is my puppy drinking so much water?” You’re definitely not alone! As a pet parent, I’ve spent many moments staring at my puppy’s water bowl, trying to figure out if their drinking habits are normal or if I should be concerned.

Water is essential for our puppies, but excessive thirst can sometimes signal underlying issues Let’s dive into why your puppy might be drinking more water than usual and when you should consider a trip to the vet

How Much Water Should a Puppy Drink Normally?

Before we jump into the concerning stuff, let’s establish what’s actually normal. The general guideline is that puppies should drink about 1 ounce of water per pound of body weight per day. So a 10-pound puppy would typically drink around 10 ounces of water daily.

But remember, this is just a guideline! Many factors can influence how much your puppy drinks:

  • Activity level (active puppies drink more)
  • Weather (hot days = more water)
  • Diet type (puppies eating wet food might drink less water)
  • Age (younger puppies may need more hydration)

7 Common Reasons Why Your Puppy Might Be Drinking Excessively

1. Medical Conditions

Several health issues can cause your puppy to drink more water than usual:

Diabetes Mellitus

When a puppy has diabetes, their body doesn’t produce enough insulin or doesn’t respond properly to insulin. This causes blood sugar levels to rise, and the body tries to flush out the excess sugar through urine. To compensate for the fluid loss, puppies drink more water.

Signs that might accompany excessive drinking:

  • Frequent urination
  • Weight loss despite increased appetite
  • Lethargy
  • Sweet-smelling breath

Kidney Disease

Puppies with kidney problems may drink more water as their kidneys struggle to concentrate urine properly. Early detection is crucial for managing kidney disease effectively.

Additional symptoms to watch for:

  • Increased urination
  • Decreased appetite
  • Weight loss
  • Vomiting
  • Lethargy

Cushing’s Disease

Though less common in puppies and more prevalent in older dogs, Cushing’s disease (hyperadrenocorticism) causes the overproduction of cortisol, leading to increased thirst.

Look for these other signs:

  • Pot-bellied appearance
  • Hair loss
  • Increased appetite
  • Excessive panting
  • Thin skin

Pyometra

This life-threatening infection of the uterus affects unspayed female dogs. Bacterial toxins affect the kidneys’ ability to retain water, causing increased urination and, consequently, increased thirst.

Warning signs include:

  • Pus from the vulva
  • Fever
  • Lethargy
  • Changes in appetite
  • Vomiting

2. Medications

Is your puppy on any medications? Some meds can make puppies super thirsty! Common ones include:

  • Corticosteroids (like prednisone)
  • Diuretics (like furosemide)
  • Anti-seizure medications (like phenobarbital)

The good news is that increased thirst from medications is usually temporary. The body often adjusts within 1-2 weeks of starting the medication. If excessive drinking continues beyond this, talk to your vet about possibly adjusting the dosage.

3. Diet Changes

Have you recently changed your puppy’s food? Some foods, especially those high in salt or protein, can make your puppy drink more water. Dry kibble also requires more water consumption compared to wet food.

I remember when I switched my puppy to a different brand of kibble, and he suddenly started drinking way more water. Turns out, the new food had a higher sodium content!

4. Environmental Factors

Hot weather is an obvious culprit for increased water consumption. But did you know that dry indoor air, especially during winter when heaters are running, can also make your puppy thirstier?

Consider using a humidifier where your puppy sleeps if you notice more nighttime drinking during dry seasons.

5. Behavioral Issues

Sometimes, excessive drinking isn’t medical at all—it’s behavioral!

Puppies might drink more water due to:

  • Boredom – When they have nothing else to do
  • Anxiety – Stress can lead to compulsive behaviors
  • Attention-seeking – If you react when they drink water

6. Activity Level

Has your puppy been more active lately? More playtime, longer walks, or new exercise routines can all increase their water needs. This is completely normal and actually healthy!

7. Age-Related Changes

Very young puppies have immature kidneys that don’t concentrate urine as well as adult dogs. This means they may drink and urinate more frequently than older dogs.

When Should You Be Concerned?

While some variation in water consumption is normal, here are some red flags that warrant a vet visit:

  1. Sudden increase in water intake without an obvious explanation (like hot weather)
  2. Drinking AND urinating excessively
  3. Other symptoms accompanying the increased thirst:
    • Lethargy
    • Vomiting or diarrhea
    • Weight loss
    • Changes in appetite
    • Behavior changes

How to Monitor Your Puppy’s Water Intake

If you’re concerned about how much water your puppy is drinking, try these monitoring tips:

  1. Measure the water – Fill your puppy’s bowl with a measured amount of water each morning
  2. Track how much is left at the end of the day
  3. Consider a marked water bowl with measurements on the side
  4. For multi-pet households, you might need separate water bowls (some even open only to specific microchips!)

What NOT to Do

NEVER restrict your puppy’s access to water unless specifically directed by your veterinarian. Water deprivation can lead to serious dehydration, electrolyte imbalances, and even kidney damage.

Even if your puppy seems to be drinking “too much,” continue providing fresh water at all times, including overnight.

What Your Vet Might Do

If you take your pup to the vet for excessive drinking, they’ll likely:

  1. Take a detailed history (bring your water consumption records!)
  2. Perform a thorough physical examination
  3. Run diagnostic tests which may include:
    • Complete bloodwork
    • Urinalysis
    • Urine culture
    • X-rays or ultrasound
    • Specific hormone tests (like ACTH stimulation for Cushing’s disease)

Treatment Options

Treatment will depend entirely on the underlying cause:

  • Diabetes: Insulin therapy and dietary management
  • Kidney disease: Fluids, diet changes, and medications based on severity
  • Cushing’s disease: Medications like trilostane
  • Behavioral issues: Training, environmental enrichment, and addressing anxiety
  • Dehydration: Fluid therapy (oral, subcutaneous, or intravenous depending on severity)

Prevention Tips

While some causes of excessive thirst can’t be prevented, you can:

  1. Provide a balanced, appropriate diet
  2. Ensure regular veterinary check-ups
  3. Keep your puppy at a healthy weight
  4. Provide mental stimulation to prevent boredom-related behaviors
  5. Consider spaying female dogs to prevent pyometra

Final Thoughts

As a pet parent, it’s natural to worry when you notice changes in your puppy’s behavior. Drinking patterns can fluctuate based on many factors, and what’s “normal” varies from dog to dog.

The key is to know YOUR puppy’s baseline, monitor for changes, and consult your vet when something seems off. Your vigilance could catch a medical condition early, when it’s easier and less expensive to treat.

Remember, puppies can’t tell us when something’s wrong—they rely on us to notice the subtle signs. Paying attention to water consumption is just one way we can be the best advocates for our furry friends!

Have you noticed your puppy drinking more water than usual? What was the cause in your case? Share your experiences in the comments below!

why is my puppy drinking so much water

Signs That Indicate It’s Time to Take Your Dog to the Vet

Drinking a lot is not a problem by itself, but what are the red flags that should cause you to be concerned about your dog’s water consumption? Sometimes, it’s difficult to notice abnormal drinking patterns, especially if you have more than one dog. If you’re having trouble monitoring how much water your dog is drinking, there are water bowls that can help, including some that use microchip technology to identify which dog is drinking the water. If your dog has additional symptoms, like vomiting, diarrhea, lethargy, decreased appetite, panting, respiratory distress, weakness, collapse, blood in the urine, straining to urinate, or general malaise, have your pet evaluated as quickly as possible. If necessary, seek the help of an emergency veterinarian.

Why Is My Dog Drinking So Much Water?

Dogs that drink a lot of water may do so for many different reasons. For instance, puppies drink a lot of water because their kidneys are not fully developed and don’t concentrate urine as well. Additionally, puppies are very active. Old dogs, while they are not as active, often drink more because of cognitive or medical issues. Why do dogs drink a lot of water? Let’s look at some of the other reasons for increased water consumption:

  • Weather and Environmental Factors: Dogs that live in hot climates are more likely to become dehydrated They are likely to be thirstier and will need more water to stay properly hydrated.
  • Diet and Food Changes: Dogs who eat wet food or diets with a high liquid content will need less water than those who eat only Switching your dog to a dry diet from wet food can make the dog drink a lot of water.
  • Increased Physical Activity: The more a dog exercises, the more water he or she will need to stay
  • Medications: Certain medications, including diuretics, anti-seizure medications, and corticosteroids, can cause a dog to drink more water and urinate
  • Medical Conditions and Diseases: Sometimes, increased thirst is due to an electrolyte imbalance or dehydration. These can be the result of various things, like high-sodium meals, excessive heat, or illness. If your dog experiences vomiting, diarrhea, lethargy, weakness, or neurological issues, an electrolyte imbalance may be to blame. Tacky (sticky and dry) gums, ropy saliva, bright red gums, and excessive panting are all signs of If you notice any of these symptoms, seek veterinary care. Other medical conditions that can cause a dog to increase water intake include:
    • Hyperthermia (elevated body temperature) or fever: This can be caused by infection, inflammation, pain, immune-mediated disease, toxin ingestion, excessive exercise, or heat stroke. If your dog has an elevated body temperature and is showing signs of dehydration, make a veterinary appointment.
    • Kidney (renal) failure: A chronic progressive condition, this involves the kidneys being unable to filter waste products from the bloodstream. This can cause dehydration and can range in severity from mild to severe. Mild cases require monitoring and dietary changes, while severe kidney failure may require hospitalisation.
    • Diabetes: There are different types of diabetes, and each can cause excessive thirst. The first is diabetes mellitus, a disease in which the pancreas does not produce enough insulin, resulting in a rise in blood sugar levels. As the body tries to expel the excess sugar through the urine, dog owners often notice increased thirst and urination. Other signs include lethargy, decreased appetite, weakness, strange smelling breath, or vomiting and diarrhea, and it’s important to seek immediate veterinary care. The other type of diabetes is diabetes insipidus, a rare condition that causes excessive thirst and urination, but is not dangerous. Because owners can’t tell which type of diabetes is affecting their dogs, veterinary diagnosis and treatment is necessary.
    • Cushing’s disease: A condition caused by the overproduction of cortisol (e.g., endogenous steroid); it’s also known as hyperadrenocorticism. Cushing’s disease causes increased thirst and urination, along with panting, thin skin, hair loss, increased hunger, and a pot-belly appearance, but it does not require immediate veterinary attention.
    • Pyometra: This is an infection of the uterus in female dogs that haven’t been spayed, and it is a life-threatening condition. Because of bacteria in the bloodstream, the dog’s kidney function may be affected, leading to increased urination, which causes increased thirst. Other symptoms of pyometra include pus coming from the vulva, fever, changes in appetite, lethargy, and vomiting. Seek immediate veterinary care, because pyometra is fatal if left untreated.
    • Liver Infection: Another condition that may be fatal if left untreated, a bacterial infection of the liver can cause increased urination and increased thirst. This kind of infection may be caused by Leptospira bacteria, which is passed through infected wild animal, farm animal, or rodent urine and is found in all types of water ranging from lakes and ponds to streams, beaches or stagnant water. Dogs should be vaccinated against Leptospirosis, but if your dog swims in a pond or drinks out of rain puddles, then presents with excessive thirst, see your veterinarian for testing and treatment.

Why Is Your Dog Drinking So Much Water?

FAQ

Why does my dog drink a lot of water?

Drinking a lot of water can be a sign that something is wrong, and an early diagnosis of a medical condition often makes treatment simpler and less invasive. Learn more about why your dog’s water intake may have increased and what your next steps should be. Many underlying health conditions can lead a pup to drink excessive amounts of water.

Can a dog drink too much water?

Many underlying health conditions can lead a pup to drink excessive amounts of water. If your dog is drinking a lot of water, this may lead to additional symptoms like excessive peeing. Never deprive your dog of water unless specifically directed by your veterinarian. How Much Water Should a Dog Drink Daily?

Do dogs drink more water?

Among water-loving dogs, drinking more water is relatively standard. Some breeds with this tendency include Retrievers, Setters, Newfoundlands, Labradors, and Standard Poodles. Also, young puppies will often amuse themselves by playing in all kinds of pools of water and drinking it. 2. Cushing’s Disease

Why is my puppy dehydrated?

If your puppy is dehydrated, then they’ll feel they need to drink lots of water. Dehydration can occur if they’re going through a bout of diarrhea, vomiting, or have excessive urination. If your puppy eats dry food, and it’s of low quality and has a high sodium content, then this can also be causing dehydration and excess drinking of water.

Why is my dog drinking a lot?

If your dog is suddenly drinking a lot and seems unwell or is vomiting, you should seek veterinary advice immediately rather than waiting to take measurements. Many things can cause your pooch to drink more than they normally would. Thankfully, there’s a simple calculation that can let you know whether their thirst is excessive or not.

How do I know if my dog is drinking too much water?

If you think your dog is drinking too much water, it’s worth measuring the amount they drink first. Do this by adding a known amount of water to their bowl and subtracting any water left in their bowl 24 hours later. If you need to top the bowl up, don’t forget to make a note of how much extra you add.

Is it normal for puppies to be really thirsty?

No, puppies aren’t always thirsty; their need for water fluctuates based on their activity level, diet, and overall health, and while increased thirst can be normal due to their higher water needs, it could also signal a serious health problem like kidney disease or diabetes.

Should I let my puppy drink as much water as she wants?

Yes, you should provide your puppy with constant access to fresh water, as they need it for proper hydration and organ function, but monitor their intake to prevent overhydration or water intoxication. Healthy puppies tend to self-regulate, but if you notice excessive drinking, consult a vet to rule out health issues.

Is it normal for puppies to want a lot of water?

Yes, it’s normal for puppies to drink a lot of water because their kidneys are less efficient at concentrating urine, they are very active and need more fluids, and they are in a rapid growth phase. A good rule of thumb is about 1 ounce of water per pound of body weight daily, but they should always have access to fresh water.

How to stop a puppy from drinking so much water?

Here’s what we did to put an end to my dog’s water gulping.
  • Offer lots of tasty water. Put a bit of bouillon into your dog’s water to make it tastier, then offer it to your dog frequently.
  • Utilize time-outs.
  • Offer something to keep her mouth full.
  • Consider a muzzle.