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How Much Water Should a Dog Drink a Day? Spilling the H2O Beans on Dog Hydration - PawSafe

How Much Water Should a Dog Drink a Day? Spilling the H2O Beans on Dog Hydration

Photo of Tamsin De La Harpe

Written by Tamsin De La Harpe

how much water should a dog drink a day

Water is vital to all beings, and determining the right amount of water that your dog should have daily is vital their overall well-being. While there’s no one-size-fits-all answer on how much aqua a dog should drink, general guidelines ensure your canine companion gets the necessary hydration.

Balancing water Intake is as vital as their food; too little can lead to dehydration, while too much might lead to intoxication. So, understanding a dog’s hydration needs is crucial in determining when to offer or to restrict water to get ahead of both extremes, which can be fatal.

You can monitor your dog’s hydration levels through their H2O intake, skin elasticity, and overall demeanor to ensure they stay adequately hydrated. With guidance from the Purina Institute on Hydration In Pets, we dug deeper to help you better understand our canine companion water requirements.

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This guideline varies widely among individual dogs and circumstances. Providing access to clean, fresh water at all times and observing changes in their drinking patterns helps ensure they remain adequately hydrated for their overall health and well-being.

Your dog’s daily water consumption is a great way to monitor their hydration levels. If you notice any significant deviations in their drinking habits — such as excessive thirst, abrupt changes in H2O consumption, or signs of dehydration — consulting a veterinarian is advisable for tailored advice and necessary interventions to maintain your dog’s optimal water intake levels.

Daily Water Requirements for Dogs

The daily aqua requirements for dogs can vary based on several factors such as their size, activity level, diet (dry or wet food), health condition, and environmental temperature. As a general guideline we can use this daily dog water intake chart so you can have a good idea of how roughly how much water your dog should be drinking per day.

daily water intake chart for dogs by weight, age and activity level

The above image is a dog water chart illustrating how much water a dog should drink per day based on factors like weight, age, and activity level. But please note:

  • The chart shows different lines for puppies, adult dogs with normal activity, senior dogs, and adult dogs with high activity.
  • The water intake is measured in ounces and is plotted against the weight of the dog in pounds.
  • As a general rule, an adult dog with normal activity needs about 1 ounce of water per pound of body weight per day.
  • Puppies and senior dogs require slightly more water, while highly active adult dogs need significantly more to stay hydrated.
  • This chart provides a visual guide, but individual needs may vary, and it’s always important to provide fresh, clean water at all times.

Also, be sure to see out article on how much water puppies need and when they can start drinking water.

Factors Affecting Canine Water Needs

key factors affecting a dog's water needs

Several factors influence a dog’s H2O needs:

1. Size

The size and weight of a dog play a significant role in determining their hydration requirements. Larger dogs generally need more drinking than smaller breeds due to their higher metabolic rates and greater body mass. For instance, a Saint Bernard will likely require more aqua than a Chihuahua of the same age and activity level.

2. Activity Level

Active dogs, engaging in vigorous exercise or spending time outdoors in warmer climates, require more liquids to stay hydrated. They lose fluids through panting and sweating from their paws, so they need to replenish those lost fluids more frequently.

As a rule of thumb, active dogs need approximately 1.5 to 2 times more water than their less active counterparts. 

3. Weather and Climate

Environmental conditions, especially temperature and humidity, significantly influence a dog’s hydration needs. Dogs can easily become dehydrated in hot and dry climates or during heatwaves.

Dogs will need more H2O to regulate body temperature and prevent elevated body temperatures. Conversely, cold weather can also increase H2O needs due to the dryness of indoor heating systems.

4. Health Conditions

Health factors like medical conditions (diabetes, kidney disease), medications, age-related changes, and stress levels can also impact a dog’s thirst, leading to either increased or decreased water consumption.

5. Diet

Wet food typically contains a higher moisture content than dry kibble, so dogs eating dry food (kibble) need to drink more water than dogs eating canned food. Feeding our dogs large amounts of food and a diet rich in carbohydrates might also increase a dog’s need for more liquid. 

This means that dogs consuming wet food may obtain a portion of their daily hydration needs from the food itself. As a result, they might drink slightly less H2O compared to dogs solely on a dry diet.

However, this doesn’t eliminate the need for freshwater. Dogs fed wet food still require access to clean H2O throughout the day to ensure proper hydration, especially since the wet food might not solely meet their total intake.

6. Age

Puppies and senior dogs may have different hydration needs. After weaning, puppies may need more aqua since proper hydration is vital for their overall health. However, it is crucial to understand when to introduce water to young dogs to avoid complications. You can also read more in our article on how much water puppies need.

On the other hand, senior dogs are vulnerable to cognitive dysfunction syndrome that may impact their nutrition and hydration levels.

7. Pregnancy or Lactation

During pregnancy, a dog’s body experiences various changes. There’s an increase in blood volume, amniotic fluid production, and the growth of developing puppies, all of which necessitate higher fluid intake to support these physiological processes.

Since milk comprises 78% H2O, lactation intensifies the need for a drink. Adequate water intake is crucial during these stages as dehydration can directly impact the quantity and quality of milk produced, affecting the health and growth of the puppies.

It’s common for pregnant and lactating dogs to drink more than usual to meet these increased demands. Pet owners should ensure that fresh, clean water is readily available at all times to support their dog’s hydration needs during pregnancy and lactation.

8. Medications

Some medications may increase a dog’s thirst or alter their liquid balance, leading to increased liquid intake. Always consult with a vet to understand how medications might affect your dog’s hydration needs.

Recognizing Dehydration in Dogs

Sharp Pei dog drinking their recommended amount of water for a day from water bowl on white floor

Dehydration in dogs occurs when they lose more fluids than they take in, leading to an imbalance that can affect their overall health. Recognizing the signs of dehydration is crucial for prompt intervention.

Some common indicators include:

  • Dry Gums and Sunken Eyes;
  • Lethargy and Weakness;
  • Reduced Skin Elasticity;
  • Excessive Panting;
  • Dry Nose and Mouth; and
  • Decreased Urination..

Note: A dry nose in dogs is not always a reliable indicator of dehydration. Dogs’ noses can vary in moisture for various reasons, including environmental factors, sunburn, or even just waking up from a nap. A dry nose does not necessarily signify dehydration.

If you suspect your dog is dehydrated, encourage them to hydrate using these ten ways to hydrate a dog, but avoid forcing it.

Preventing Dehydration

how much water should dogs drink a day

Preventing dehydration in dogs is paramount to maintaining their health and vitality. A well-hydrated pup is more energetic, has better organ function, and can better regulate body temperature. 

Here’s a comprehensive guide on how to ensure your canine companion stays adequately hydrated:

  1. Water Accessibility

    The cornerstone of preventing dehydration is ensuring constant access to fresh, clean H2O. Place multiple liquid bowls in various locations around the house and refill them regularly, especially in warmer climates or after strenuous activity.

    Placing the bowls in different places will also help your dog move around the house, reducing boredom. 

  2. Observing Water Intake

    Familiarize yourself with your dog’s normal H20 consumption patterns. Any drastic changes could signal an underlying health issue. Encourage drinking after playtime, walks, or during warmer weather.

  3. Dietary Hydration

    According to our guide, wet food contains 80 to 85% liquid. Incorporating moist foods into their diet can supplement their overall fluid intake. You can also consider adding water-rich fruits (like watermelon) or vegetables suitable for dogs as treats under the guidance of a veterinarian.

  4. Temperature Awareness

    During hot weather, a dog’s body may be unable to regulate the temperatures around it. This can lead to excessive panting, which can result in dehydration. This can also lead to heatstroke, which is a life-threatening condition.

    During hot weather, ensure shady spots are available, and always provide cool, fresh water. Limit outdoor activities during peak temperatures.  You can check our article on how hot is too hot for a dog.

  5. Exercise Moderation

    Exercise is essential but should be balanced, especially in warm weather. Provide breaks and water during and after physical activities. Be mindful of asphalt or surfaces that can get hot and burn your dog’s paw pads.

  6. Travel Preparation

    Pack portable H2O bowls and carry enough from home to maintain your dog’s routine. Staying hydrated is equally crucial during journeys. Having bottled liquid stored for emergencies can be beneficial.

Dog guardians play a vital role in preventing dehydration by actively managing their dog’s access to H2O, maintaining a balanced diet, and being mindful of environmental factors. Taking proactive steps ensures your beloved canine companion remains healthy and hydrated throughout their life.

Water Intake and Dog Health

Labrador drinking water from a bottle

H2O intake is crucial for a dog’s overall health and well-being. Adequate hydration is essential for proper digestion, nutrient absorption, temperature regulation, and organ function.

Here’s why aqua intake matters:


There are other alternativ-e-archives to keep your dog hydrated. However, dogs still need water to keep their bodily functions at best. Lack of liquid in their bodies can affect their overall vitality.

Temperature Regulation

Dogs regulate their body temperature through panting and sweating from their paw pads. Sufficient liquid in their bodies helps them cool down during hot weather or physical activity.

Digestion and Nutrient Absorption

H2O is essential for proper digestion, ensuring the breakdown of food and absorption of nutrients. Insufficient H2O intake can lead to constipation or other digestive issues.

Organ Function

Proper hydration supports the function of vital organs, including the kidneys, liver, and heart. It helps in flushing out toxins and waste products from the body.

Risks of Excessive Water Consumption

Brown Collie mix drinking water from hands with water bottle

Too much H2O? Yes, it’s a thing, even for dogs. They call it water intoxication or, if you want to sound like a fancy vet, polydipsia. The effects aren’t too funny, though; they include the following:

1. Hyponatremia

Consuming excessive amounts of liquid without the corresponding intake of electrolytes can dilute sodium levels in the blood, leading to hyponatremia. This imbalance can cause 0symptoms like weakness, lethargy, vomiting, seizures, and in severe cases, it can be life-threatening.

2. Increased Urination

Excessive liquid intake leads to increased potty breaks, potentially causing frequent accidents indoors and the need for more frequent bathroom breaks.

3. Underlying Health Conditions

Polydipsia can be a symptom of various health issues such as diabetes, kidney disease, Cushing’s disease, liver problems, urinary tract infections, or hormonal imbalances. Treating the underlying condition is crucial to managing the urge for excessive H2O consumption.

4. Behavioral Concerns

In some cases, excessive thirst may also stem from behavioral issues or psychological stress, warranting behavioral evaluation and potential intervention.

Monitoring Your Dog’s Water Intake

Understanding your dog’s typical drinking habits is the first step when monitoring your dog’s liquid intake. Observing your pet’s behavior is also crucial — any noticeable changes in drinking patterns could signal health issues, such as diabetes or kidney problems.

Always provide fresh, clean water, ensuring multiple accessible bowls around your home, especially in multi-pet households. After vigorous activities or play, temporarily regulating access to water can prevent overconsumption. 

Remember: While hydration is vital, excessive H2O intake can lead to complications, so maintaining a healthy balance in your dog’s water consumption is key to their well-being and happiness.

Tips for Encouraging Drinking

Encouraging your dog to drink more liquids is important for their health. Here are some tips to help:

Clean Water

Ensure the liquid is fresh and clean. Dogs might avoid stagnant or dirty liquid. Change it frequently and wash their bowls.

Accessible Bowls

Place their bowls in different areas of the house where your dog spends time. This makes it convenient for them to drink when they’re nearby and reduces boredom as they move to where the bowls are.


Some dogs might like a little flavor in their H2O. Adding a small amount of sodium-free broth or using a pet liquid fountain that circulates liquid can entice them to drink more.

Ice Cubes

Some dogs enjoy ice cubes in their drink, especially during warmer weather. It adds a playful element and keeps the drink cool.

Regular Exercise

Ensure your dog gets enough exercise. They’ll naturally get thirstier after physical activity due to panting.

Remember, each dog is unique, so it might take some trial and error to find out what works best for encouraging your dog to drink more. 

When to Consult a Vet

Sometimes, a dog can scare their humans by changing how much aqua the drink. It might be nothing, but it might be a sign to ring up the vet.

Here are some other scenarios when it’s wise to consult a vet:

Changes in Drinking Habits

If a dog suddenly starts drinking more or less water than they usually do, and it’s not just because they turned into a temporary couch potato or had an extra-long game of fetch, it could mean something’s off.

Accompanying Symptoms

If changes in drinking habits are accompanied by symptoms like vomiting, diarrhea, lethargy, weight loss, or any other unusual behavior, it’s essential to consult a vet promptly.

Existing Health Conditions

For dogs with pre-existing health conditions such as kidney disease, diabetes, or urinary tract issues, any changes in drinking habits should be closely monitored and discussed with a vet.

Frequently Asked Questions (FAQs)

Determining just the right amount of a drink for a dog can be like hitting the bullseye in a game of darts – it requires precision. These FAQs dive into canine hydration.

What happens when a pup drinks too much water?

Excessive water consumption in dogs can lead to water intoxication, where an imbalance in electrolytes, particularly sodium, occurs due to an overwhelming intake of liquid in a short span. This disrupts the electrolyte balance, causing cells to swell, leading to symptoms like lethargy, bloating, vomiting, and, in severe cases, seizures or coma.

How much water should a 25-pound dog drink?

The amount of water a dog needs can vary based on factors like activity level, diet, weather, and individual differences. As a general guideline, a 25-pound dog might need approximately one ounce of liquid per pound of body weight daily. This means they may require around  25 ounces of water daily.

How much water should a dog drink in 24 hours?

The amount of water a dog should drink in 24 hours varies depending on factors like size, diet, age, activity level, and weather conditions. Generally, a healthy dog needs about 1 ounce of water per pound of body weight per day. For example, a 30-pound dog would typically require about 30 ounces of water daily. Always ensure fresh water is available, and monitor for any significant changes in drinking habits, as they could indicate health issues.

How much water should an 8 pound dog drink a day?

An 8-pound dog should drink approximately 8 ounces of water daily, which is about 1 cup. This is a general guideline and can vary based on the dog’s specific needs and circumstances, such as exercise intensity and environmental temperature. Regularly check the water bowl to ensure it’s clean and filled.

How many litres of water does a dog need?

The water requirement for a dog in liters can be estimated by converting their weight in pounds to ounces and then converting ounces to liters. For instance, a 50-pound dog needs about 50 ounces of water daily, which is approximately 1.5 liters. It’s important to remember that this is a general guideline and individual needs may vary.

Should I give my dog water all the time?

Yes, dogs should have access to clean, fresh water at all times. However, when puppies are potty training, it can be helpful to limit their water intake 2 to 3 hours before bedtime to reduce the need for nighttime bathroom breaks. This helps in managing their potty training schedule more effectively.

Can a dog drink too much water?

Yes, a dog can drink too much water, leading to a condition called water intoxication, which can be dangerous. Symptoms include lethargy, bloating, vomiting, loss of coordination, and in severe cases, seizures or coma. If you suspect your dog has drunk too much water, seek veterinary attention immediately.

How many times a day should I give my dog water?

You should ensure that your dog has continuous access to water throughout the day. The water bowl should be refilled with fresh water as needed. There is no specific number of times to give a dog water, as their access to it should be unrestricted.

How much water should a dog with kidney disease drink?

Dogs with kidney disease often need to drink more water than healthy dogs to help flush out toxins from their bodies. However, the exact amount can vary based on the severity of the disease and the dog’s size. Always follow your veterinarian’s recommendations regarding water intake and monitoring for dogs with kidney disease.

What to do if your dog drinks too much water?

If your dog drinks too much water and shows signs of water intoxication (such as vomiting, bloating, lethargy, or coordination problems), it’s crucial to seek veterinary care immediately. While waiting for care, limit their water intake and keep them calm and comfortable. Quick veterinary intervention is essential in treating water intoxication.

Final Thoughts

The amount of H2O a dog needs to drink can vary based on size, activity level, diet, and environmental conditions. As a general guideline, dogs typically require around 1 ounce of H2O per pound of body weight daily.

However, individual needs may differ. Monitoring your dog’s behavior, especially during warmer weather or after exercise, can give clues about their hydration needs. Always provide fresh, clean drinks and ensure it’s easily accessible.

 If you notice any significant changes in their drinking habits or suspect dehydration, consulting a veterinarian is wise for personalized guidance. Remember, consistent access to water is crucial for your dog’s overall health and well-being.

Meet Your Experts

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Tamsin De La Harpe


Tamsin de la Harpe has nearly two decades of experience with dogs in rescue, training, and behavior modification with fearful and aggressive dogs. She has worked closely with veterinarians and various kennels, building up extensive medical knowledge and an understanding of canine health and physiology. She also spent two years in the animal sciences as a canine nutrition researcher, focusing on longevity and holistic healthcare for our four-legged companions. Tamsin currently keeps a busy homestead with an assortment of rescue dogs and three Bullmastiffs.

Tamsin de la Harpe has nearly two decades of experience with dogs in rescue, training, and behavior modification with fearful and aggressive dogs. She has worked closely with veterinarians and various kennels, building up extensive medical knowledge and an understanding of canine health and physiology. She also spent two years in the animal sciences as a canine nutrition researcher, focusing on longevity and holistic healthcare for our four-legged companions. Tamsin currently keeps a busy homestead with an assortment of rescue dogs and three Bullmastiffs.