Changes in water intake are not always obvious, but they often become clear through your daily routine. If your dog won’t drink water or you feel like your dog is not drinking water, it can be concerning.
Many pet owners notice changes not by measuring intake, but by simple routines, like realizing you’re not refilling or changing the water bowl as often. Questions such as “Why is my dog not drinking water?” or concerns like “My dog doesn’t drink enough water” are common, especially when everything else seems normal.
Understanding what is typical can help, but it also raises an important question: How much water should a dog drink a day? Keep reading to find out.
How Much Water Should a Dog Drink?
Water is a major component of your dog’s body. In healthy adult dogs, about 60%-70% of body weight is made up of water, often referred to as total body water.(1)
Dogs maintain this balance through a combination of drinking water and moisture from their food. Free access to fresh water typically provides the majority of daily intake, but diet plays an important role.
Dogs eating dry food, which contains less than 10% moisture, depend more on drinking to meet their hydration needs.(2) In contrast, dogs eating wet food may receive 65% to 75% moisture from the food, which contributes to their water intake. This includes metabolic water contributing to about 5%-10% of total water intake, which is produced by the oxidation of macronutrients from fats, proteins, and carbohydrates. These numbers are dependent upon the age, body condition score, and lean mass of each dog.
To help answer questions you might have, like “How much water should a dog drink?” and “How much water does a dog need?,” as a general guideline, a healthy dog’s daily water requirement is estimated at about 50 mL per kilogram of body weight, with a typical range of 40 to 60 mL/kg/day.(4)
Keep in mind, this is a starting point. Individual needs vary, and what matters most is what is normal for your dog.
Understand Your Dog’s Hydration Needs
Water plays a critical role in nearly every function of the body. The total amount of water in the body supports circulation, temperature regulation, digestion and normal organ function. Hydration status is not static and can shift based on(2):
- Age. Puppies often have higher water content, while older dogs may have less.
- Body composition. Dogs with higher body fat have lower total body water.
- Breed and body type. Differences in body size and composition among breeds can influence total body water.
- Muscle mass. Muscle contains more water than fat, influencing overall hydration balance.
Factors That Influence Hydration
Every dog is a little different when it comes to hydration. While general guidelines are helpful, your dog’s actual water needs are influenced by several factors:
- Activity level. More active dogs lose more water, especially through panting.
- Diet. Dogs eating dry food rely more on drinking water, while wet food provides a significant amount of moisture.
- Environment. Warmer temperatures and dry air can increase water loss.
- Overall health. Certain conditions can increase or decrease water needs.
The Role of Activity
Activity level, in particular, can have a significant impact on hydration. As dogs exercise, their bodies generate heat that must be dissipated to maintain a normal temperature. One of the primary ways dogs do this is through evaporation, mainly by panting, which increases water loss. In working and athletic dogs, studies have shown that water turnover can increase substantially during periods of sustained activity, with water turnover increasing by up to 2–3 times resting levels during sustained exercise.(3)
Because hydration needs shift with activity, tracking both together can provide a more complete picture:
- Activity and hydration are connected. More movement often means higher water needs.
- Patterns may matter more than single days. Changes over time may signal an underlying condition.
- Tracking helps identify subtle changes early. Small shifts can be easier to recognize when trends are visible.
In addition to monitoring how much your dog drinks, you can use tools like the Petivity® Smart GPS + Activity Tracker for Dogs to monitor your dog’s activity, helping you understand how exercise, weather and routine influence your dog’s water intake. Recognizing what is normal for your dog, especially as these factors change over time, can help guide how you support their hydration day to day.
Reasons Why Your Dog Is Not Drinking Water
A decrease in water intake can happen for a variety of reasons. Many pet owners wonder, “Why is my dog not drinking water but eating?” or notice situations like a dog not drinking water but peeing, which can feel confusing.
If your dog refuses to drink water or you can’t get your dog to drink water, looking at recent changes can often provide clues.
Everyday Changes That Can Affect Drinking
- Diet. Switching foods, especially between wet and dry diets, can temporarily affect drinking habits.
- Illness. Conditions such as vomiting, nausea, pain, fever, oral discomfort, or other symptoms can reduce water intake. Some illnesses may temporarily affect appetite and thirst.
- Medication. Common veterinary drugs such as corticosteroids (prednisone), diuretics (furosemide), and anticonvulsants (phenobarbital) can significantly increase or decrease a dog’s water intake.
- New bowls or bowl placement. Some dogs are sensitive to changes in bowl material, height or location.
- Routine. Travel, boarding or changes at home can influence normal behavior, including drinking.
- Stress or anxiety. Changes in the home, new pets or unfamiliar environments can result in dogs not drinking water as much as they normally do.
- Water source. Different-tasting water, such as tap vs. filtered or well water, may decrease interest.
Hydration Changes in Older Dogs
As dogs age, their hydration needs and behaviors can shift in subtle ways(2):
- Body composition. Increased body fat and reduced muscle mass can affect total body water.
- Canine cognitive dysfunction. Changes in awareness or routine may lead to less frequent drinking.
- Discomfort with eating or drinking. Dental disease or other oral discomfort can reduce interest in water.
- General decline in activity. Less movement can sometimes lead to less frequent drinking.
- Reduced mobility. Osteoarthritis (OA) or weakness may make it harder for dogs to get to the water bowl.
- Reduced thirst perception. Some older dogs may show less interest in drinking, though the mechanisms are not fully understood.
- Underlying conditions and health concerns. Many age-related diseases, including chronic kidney disease (CKD), diabetes mellitus, Cushing's disease, pyometra, and more, can either significantly increase or decrease water intake as a symptom to a health condition. If you notice any notable changes in your dog’s drinking habits, then it’s always best to consult with your veterinarian for further evaluation.
Understanding the reason behind a change in water intake often comes down to context. Looking at your dog’s overall behavior, energy level, appetite and routine can help determine whether the change is temporary or something that may need closer attention. If you are unsure, your veterinarian can help evaluate these changes and guide next steps.
From here, it is helpful to look more closely at how to assess your dog’s hydration status at home and when to seek care.
Assessing Your Dog’s Hydration Status
Looking at your dog’s hydration at home can help you decide whether a change in drinking is something to monitor or something that needs more immediate attention.
Dehydration occurs when the body loses more fluids than it takes in, which can affect normal body functions and electrolyte balance. In many cases, mild dehydration can be addressed early, especially when recognized promptly.
Here are a few simple ways to assess your dog at home(4):
- Capillary refill time. Gently press your finger against your dog’s gums until they briefly turn white, then release. The color should return to pink within about 1 to 2 seconds. A delayed refill time may indicate dehydration or changes in circulation.
- Gum moisture and color. Your dog’s gums should be moist and a healthy pink color. Gums that feel dry or tacky, or appear pale, can be a sign of dehydration.
- Mentation (alertness). A well-hydrated dog is typically alert and responsive. Changes, such as lethargy, dullness or decreased responsiveness, can be associated with dehydration or underlying illness.
- Skin turgor (skin elasticity). Gently lift the skin over your dog’s shoulders, and release it. In a well-hydrated dog, the skin should return quickly to its normal position. If it returns slowly (known as “skin tenting”), this may indicate dehydration. However, be mindful that there are some limitations to this test. For example, in obese dogs, excess subcutaneous fat can mask dehydration can create a false positive. A false positive can also be created when doing this test on geriatric or cachectic dogs where their reduced skin elasticity may cause "skin tenting" even when adequately hydrated. It’s always best to consult a veterinarian for further guidance.
Mild changes can be common, especially with shifts in routine, diet or activity. However, if you notice multiple signs or anything that concerns you, it is always appropriate to check in with your veterinarian. Early recognition and guidance can help keep small issues from becoming more serious.
Troubleshooting: When to Worry and When to Go to the Veterinarian
A common question is: When should I worry about my dog not drinking water?
While short-term changes can be normal, it is important to monitor how long the change lasts. Pet owners may also wonder how long a dog can go without water? A dog that has not consumed water for 24 hours, particularly if they are also not eating, may begin to show early signs of dehydration. Small dogs, puppies, and dogs with underlying health conditions are especially vulnerable to rapid fluid losses.
If your dog won’t drink water and is showing some of the signs listed below, your dog should be evaluated by a veterinarian.
Contact your veterinarian if you notice:
- Changes in appetite
- Continued decrease in water intake over more than a day or two
- Dry or tacky gums
- Lethargy or decreased energy
- Vomiting or diarrhea along with reduced drinking
Seek veterinary care immediately if you notice:
- Abdominal distension (could indicate Gastric Dilatation-Volvulus or other emergencies)
- Bloody vomit or diarrhea
- Inability to drink water
- Ongoing vomiting or inability to keep fluids down
- Pale or white gums (indicating shock/poor perfusion, distinct from "dry gums")
- Seizures or tremors
- Signs of significant dehydration (such as very dry gums, sunken eyes and marked skin tenting)
- Weakness or collapse
What to Expect at the Veterinarian
Your veterinarian will start with a physical exam, including checking hydration status through gum moisture, capillary refill time and overall mental state. They will also ask questions about your dog’s recent behavior, appetite, activity level and any changes at home.
Depending on your dog’s condition, additional tests may include:
- Bloodwork. To evaluate organ function, electrolyte balance and signs of illness
- Urinalysis. To assess hydration status and kidney function
- Other testing. To identify an underlying issue
So, how do you hydrate a dog? In mild cases, encouraging voluntary drinking and increasing dietary moisture can help. In more serious cases, your veterinarian may recommend additional support. If your dog is dehydrated, treatment depends on the severity and the underlying cause. Your veterinarian may recommend:
- Oral rehydration. For mild cases, encouraging drinking at home
- Subcutaneous (under the skin) fluids. Often used for mild to moderate dehydration in outpatient settings
- Intravenous (IV) fluids. Used in more severe cases or when a dog cannot tolerate oral fluids, typically requiring hospitalization. At this point, the veterinarian may also evaluate and correct electrolyte imbalances, which can occur alongside dehydration.
Your veterinarian will recommend the best approach based on your dog’s individual needs.
Practical Tips for Encouraging Your Dog to Drink
If you are wondering how to get a dog to drink more water or what to do if your dog won’t drink water, you can try several simple strategies if your dog is drinking less but otherwise seems well:
- Provide fresh water frequently. Clean and refill water bowls regularly.
- Try different bowls. Some dogs prefer certain materials, shapes or heights.
- Change the water source. Filtered or bottled water may be more appealing to some dogs.
- Add moisture to food. Sometimes how to get a dog to drink water can be as simple as mixing water into kibble or offering wet food to help increase overall intake.
- Offer multiple water stations. Especially helpful in larger homes or multilevel spaces.
- Use a pet water fountain. Moving water can encourage some dogs to drink more.
- Track activity and intake. Using tools like an activity tracker alongside a simple daily log of water intake can help you identify patterns and changes early.
- Incorporate water into routine. Offer water after walks, play or meals.
You may also wonder, “Can dogs drink anything other than water?” While certain options, like plain, unseasoned, onion-free and garlic-free low-sodium broth, may be used occasionally, water should remain the primary source of hydration unless otherwise directed by your veterinarian. Always consult with your veterinarian before offering any non-water liquids to ensure that it is safe to give to your dog.
Changes in your dog’s drinking habits are often subtle, but patterns over time matter most. Factors like diet, activity, environment and age all influence hydration. Tracking activity with tools like the Petivity® Smart GPS + Activity Tracker for Dogs and keeping a simple log can help if your dog is not drinking water consistently. If something seems off or persists, your veterinarian can recommend next steps to help keep your dog healthy and well hydrated.
Want to be more proactive about your dog’s health and well-being? Explore our blog for expert advice and insights that can help you stay one step ahead of potential health concerns.