You fill your dog’s water bowl in the morning and notice at dinnertime that it is almost exactly as full as when you left. Your dog ate her breakfast, went for a short walk, and has been sleeping most of the day. She does not look acutely unwell, but you cannot remember the last time you saw her drink. It is easy to underestimate how much a dog drinks over the course of a day because they do it in short visits to the bowl, not in one long session. When reduced drinking lasts more than 24 hours or is accompanied by any other change, it is your signal to pay closer attention and potentially contact your veterinarian. Daily water requirements in dogs scale with body weight and metabolic rate. The general guideline used in veterinary practice is 50-100 mL per kilogram of body weight per day at rest in a temperate environment. A 10 kg (22 lb) dog should drink approximately 500 mL-1 liter per day. A 30 kg (66 lb) dog should drink approximately 1.5-3 liters. These figures increase substantially with exercise, heat, pregnancy, lactation, or illness causing fluid losses such as vomiting or diarrhea. Diet composition has a large effect on measured bowl intake. Dogs eating wet or canned food (approximately 75-80% water) consume much of their daily water requirement through food and visit the water bowl less frequently. Dogs eating dry kibble (approximately 8-12% water) must drink more from the bowl to meet their total fluid requirement. Switching from kibble to wet food often produces an apparent sudden drop in water consumption that is entirely normal and not a cause for concern. Nausea is probably the single most common medical reason a dog stops drinking. A dog that feels nauseated will avoid the water bowl even if it is thirsty, because drinking triggers gastric distension that worsens nausea and often precipitates vomiting. Clinical signs of nausea in dogs include lip licking, repeated swallowing, drooling, grass eating, seeking isolation, and intermittent retching without productive vomiting. Nausea accompanies a wide range of conditions: pancreatitis, parvovirus, gastroenteritis, uremia (kidney failure), hepatic encephalopathy (liver failure), vestibular disease, motion sickness, and adverse drug reactions. Identifying and treating the underlying cause of nausea is the priority. Maropitant citrate (Cerenia, 1 mg/kg subcutaneously or 2 mg/kg orally once daily) is the most effective veterinary antiemetic and significantly reduces nausea-associated inappetence and hypodipsia. Drinking water requires the dog to lower its head to the bowl, open its mouth, and create suction. Any source of oral pain makes this process uncomfortable enough that the dog avoids it. Common causes include severe periodontal disease with exposed root canals or fractured teeth, oral ulcers from uraemic stomatitis (complicating kidney failure), caustic substance ingestion (cleaning products, plants such as Euphorbia species), oral foreign bodies (stick fragments, bone shards lodged between teeth), and oral tumors. Examination of the oral cavity, including lifting the lips to assess the gingiva, checking for broken teeth, and looking for swelling or ulcers, is a useful first step. Dogs with oral pain often mouth water rather than swallowing it, drop food while eating, or paw at the mouth. Many systemic diseases reduce voluntary water intake through a combination of nausea, lethargy, and loss of normal physiological drive. Parvo virus (canine parvovirus CPV-2) causes severe vomiting and diarrhea with complete fluid refusal in puppies; this is a life-threatening emergency requiring hospitalization with IV fluids and antiemetics. Addison’s disease (hypoadrenocorticism) causes electrolyte imbalances (low sodium, high potassium) that produce weakness, vomiting, and collapse; affected dogs may refuse water entirely during an Addisonian crisis. End-stage kidney disease produces uremia with profound nausea and stomatitis. Liver failure produces hepatic encephalopathy with altered mentation and vomiting. Any dog with reduced drinking and concurrent signs of systemic illness (lethargy, vomiting, pale gums, collapse) requires emergency evaluation. Dogs with pain in the neck, spine, hips, or front legs may find the posture required to drink from a floor-level bowl too uncomfortable to adopt. This is particularly relevant in dogs with cervical (neck) disc disease, hip dysplasia, elbow arthritis, or recent orthopedic surgery. The dog may approach the bowl and then turn away without drinking. Elevating the water bowl to a comfortable height for the dog’s size can resolve the problem. A dog that resumes normal drinking when the bowl is raised almost certainly has musculoskeletal pain as the underlying cause. Psychological stress reliably reduces food and water intake in dogs. Common triggers include moving to a new home, the addition of a new pet or family member, boarding or kenneling, loud noise events (thunderstorms, fireworks), loss of a companion, and changes in the owner’s schedule. Dogs may also refuse water that smells unfamiliar, particularly when traveling and drinking from a municipal supply with different mineral content or chlorination levels than their home water. Stress-related reduced drinking typically resolves within 24-48 hours as the dog acclimatizes. Offering familiar bottled water when traveling or mixing a small amount of low-sodium chicken broth into the water bowl can help encourage intake in an anxious dog.
The water delivery system itself is an underappreciated cause of reduced intake. Plastic water bowls develop surface scratches over time where bacteria form a biofilm that dogs can detect through smell; switching to a stainless steel or ceramic bowl often immediately resolves the problem. A bowl placed in a noisy, high-traffic area may deter a timid dog from approaching. Stale or warm water is less palatable than fresh cool water. Some dogs have a strong preference for running water and will drink significantly more from a pet water fountain than a static bowl. Water bowls placed too close to the food bowl or litter box may be avoided due to learned aversion. Reviewing and optimizing water bowl setup is always the first step when a healthy dog appears to be drinking less. Mild lethargy and reduced eating and drinking for 24-48 hours following vaccination is a recognized normal immune response, particularly after killed-virus adjuvanted vaccines. The dog’s body temperature rises slightly (low-grade fever), which paradoxically can suppress the thirst drive in the short term. Most dogs return to normal appetite and water intake within 24-48 hours of vaccination without any intervention. Reduced drinking persisting beyond 48 hours post-vaccination, or accompanied by swelling at the injection site, facial swelling, vomiting, or difficulty breathing, indicates a more significant adverse reaction requiring veterinary attention. Several commonly prescribed veterinary medications reduce appetite and water intake as side effects. Antibiotics, particularly metronidazole (common cause of nausea and metallic taste aversion in dogs), doxycycline, and trimethoprim-sulfamethoxazole, can cause nausea and reduce willingness to drink. Non-steroidal anti-inflammatory drugs (NSAIDs such as carprofen, meloxicam, and grapiprant) can cause GI upset and reduced intake in some dogs. Opioid analgesics cause nausea and dry mouth that can paradoxically reduce drinking. Chemotherapy agents reliably cause nausea and water aversion. If a dog stops drinking shortly after starting a new medication, contact your veterinarian; maropitant (Cerenia) may be added to manage nausea, or the medication may need to be changed. Skin Turgor Test: Gently pinch and lift a fold of skin at the back of the neck or between the shoulder blades. Release it and watch how quickly it returns to its original position. In a well-hydrated dog, the skin snaps back in under 1 second. In a mildly dehydrated dog (5%), it returns in 1-2 seconds. In a moderately dehydrated dog (6-8%), it stays tented for 2 or more seconds. At 10% or greater dehydration, the skin remains tented and the dog is in a medical emergency. Note: this test is less reliable in obese dogs (skin snaps back due to fat) and very thin or elderly dogs (skin may be slow to return even when well hydrated). Capillary Refill Time (CRT): Lift your dog’s upper lip and press a fingertip firmly against the pink gum tissue for 2 seconds. Release and count the seconds until the pink color returns to the blanched spot. Normal CRT is under 2 seconds. A CRT of 2-3 seconds suggests poor perfusion. A CRT above 3 seconds is an emergency sign indicating circulatory compromise. Pale, white, or blue gums regardless of CRT are also emergency signs. You can tell a dog is dehydrated because its nose is dry and warm. The moisture of a dog’s nasal planum is not a reliable indicator of hydration status. Dogs have dry noses after sleeping, after lying in the sun, and in low-humidity environments, all without being dehydrated. Conversely, a severely dehydrated dog can still have a moist nose. The accurate home assessments of hydration are the skin turgor test (skin at the back of the neck should snap back in under 1 second) and capillary refill time (gum color should return in under 2 seconds after blanching). A veterinarian assesses hydration more accurately through physical examination combined with packed cell volume (PCV) and total protein measurements from a blood sample. If my dog won’t drink, I should give it Gatorade or sports drinks to replenish its electrolytes. Sports drinks formulated for humans are inappropriate for dogs and can worsen dehydration. They contain high concentrations of sodium (up to 110 mg per 8 oz serving) and sugar, neither of which is appropriate for a sick dog. High sodium intake in a dehydrated dog with compromised kidney function can precipitate hypernatremia (high blood sodium), causing neurological signs. If you want to encourage a mildly dehydrated dog that is not vomiting to drink, offer unflavored Pedialyte diluted 50:50 with water, or plain low-sodium chicken or beef broth (check the label for onion or garlic, which are toxic). If the dog is vomiting or severely dehydrated, IV fluids from a veterinarian are the only appropriate intervention. Dogs instinctively know how much water they need and will always drink enough if water is available. While healthy dogs do regulate their water intake reasonably well under normal conditions, this regulation fails in several disease states. Nausea suppresses thirst even when the dog is severely dehydrated. Dogs with Addison’s disease, end-stage kidney failure, and severe systemic illness may not drink even when severely fluid-depleted. Elderly dogs with cognitive dysfunction may forget to drink or lose the ability to find the water bowl. Dogs in significant pain may avoid the posture required to drink. Monitoring your dog’s water intake is an important part of routine health observation, and any sustained reduction from the individual dog’s baseline warrants investigation rather than the assumption that the dog will self-regulate. A healthy adult dog can survive approximately 72 hours (3 days) without water before organ failure becomes life-threatening, but clinical signs of dehydration appear much sooner. At approximately 5% dehydration, dogs show lethargy and reduced skin elasticity. At 10-12% dehydration, circulatory compromise, sunken eyes, and muscle weakness appear. At 15% dehydration, death is likely. In practice, a sick dog that is also vomiting, has diarrhea, or has a fever becomes critically dehydrated much faster than a healthy dog at rest. Any dog that has not been seen drinking for more than 24 hours should be evaluated by a veterinarian, not kept at home with a “wait and see” approach. Yes, if the switch was from dry kibble to wet or raw food. Wet food is approximately 75-80% water, so a dog eating it obtains most of its daily fluid requirement through food rather than the water bowl. Visits to the bowl will decrease noticeably and this is entirely normal. If the switch was in the other direction (from wet to dry food), you should expect increased water bowl visits. If the dog stopped drinking after switching to a new dry food brand, a palatability or scent issue with the new food may be reducing eating, which in turn reduces thirst. Return to the previous food or transition more gradually if this occurs. Yes, several safe additions can encourage drinking. A small amount of low-sodium chicken or beef broth (check ingredients for onion and garlic, which are toxic) added to water increases palatability for most dogs. Unsalted bone broth is another option. Some dogs prefer water at cool or room temperature rather than very cold. A pet water fountain (circulating water dispenser) significantly increases intake in many dogs compared to a static bowl. Adding a tablespoon of plain canned tuna water (in water, not oil) to the bowl is another option. Avoid adding anything sweetened, caffeinated, or containing xylitol, onion, garlic, grapes, or any other dog-toxic ingredient. Dogs often prefer puddle water because it contains dissolved minerals, organic material, and microbial scents that make it smell more interesting than clean tap water. This is a sensory preference, not an indication that tap water is harmful. The concern with puddle drinking is contamination: puddles can contain motor oil, fertilizers, pesticides, antifreeze (ethylene glycol, which is sweet-tasting and acutely toxic to dogs), and parasites including Giardia and Leptospira. If your dog consistently prefers outdoor water sources to its bowl, try switching to filtered or bottled water, using a water fountain, or adding a small amount of low-sodium broth to make the bowl water more appealing. A dog that is eating normally is receiving some fluid through food, which provides some reassurance. The concern level depends on what the dog is eating (wet food provides much more fluid than kibble), how reduced the water intake is, and whether any other signs are present. If the dog is eating wet food and appears healthy and active, reduced bowl water intake may simply reflect adequate fluid intake from food. If the dog is eating dry kibble and has not visited the water bowl in 24 hours, this is clinically significant even without other signs, and warrants checking for dental pain, bowl aversion, or other causes. A wellness check with your vet is appropriate if the pattern persists beyond 24-48 hours. Yes. Dogs drink less water in cold weather for several reasons: reduced metabolic rate, less panting and evaporative water loss, lower ambient temperature reducing cellular water demand, and the fact that cold water from an outdoor bowl may be less palatable or even partially frozen. This seasonal reduction in water intake in an otherwise healthy and active dog is normal. If a dog is drinking substantially less in winter but also eating less and becoming lethargic, hypothyroidism (low thyroid hormone) is worth investigating, as it causes reduced metabolic rate with secondary reduction in all appetites including thirst. If the dog is mildly unwell but not vomiting, try: offering water from your hand or a spoon, adding low-sodium broth to the water, slightly warming the water (body temperature is often more palatable to an ill dog), offering ice chips, or switching to wet food temporarily to increase fluid intake through diet. Never force water into a dog’s mouth with a syringe if it is vomiting, as this risks aspiration pneumonia. If the dog is vomiting or refusing all fluid intake, intravenous or subcutaneous fluid therapy from a veterinarian is the only safe way to restore hydration; attempting to force fluids at home in a sick vomiting dog is dangerous. For more guides on keeping your dog healthy, browse all our Dog Health articles.
Dog Not Drinking Water: Causes, Warning Signs, and What to Do
Internal Medicine and Emergency Care
This article is reviewed for clinical accuracy. Always consult your veterinarian for diagnosis and treatment.
Key Takeaways
How Much Should a Dog Drink Each Day?
Dog Weight
Daily Water Requirement (at rest)
Note
5 kg (11 lb)
250-500 mL (about 1-2 cups)
Small breed; reduce if eating wet food
10 kg (22 lb)
500 mL-1 liter (2-4 cups)
Cocker Spaniel, Beagle size
20 kg (44 lb)
1-2 liters (4-8 cups)
Border Collie, Springer Spaniel size
30 kg (66 lb)
1.5-3 liters (6-12 cups)
Labrador, Golden Retriever size
40 kg (88 lb)
2-4 liters (8-16 cups)
German Shepherd, Rottweiler size
Causes of a Dog Not Drinking Water
Nausea
Oral Pain: Dental Disease, Mouth Injury, and Stomatitis
Illness and Systemic Disease
Pain (Non-Oral Sources)
Stress, Anxiety, and Environmental Change
Water Bowl Issues
Post-Vaccination Reactions
Medication Side Effects
Red Flags: Emergency Veterinary Care Needed
How to Assess Dehydration at Home
Diagnostic Workup for a Dog Not Drinking
Diagnostic Test
What It Shows
When Used
Physical examination including hydration status assessment
Skin turgor, CRT, mucous membrane color, body weight, body condition score; oral cavity examination for pain, ulcers, foreign bodies
Every case; first step
Complete blood count (CBC)
PCV (packed cell volume) elevation with dehydration; infection markers; anemia suggesting bleeding or chronic disease
Any dog not drinking for more than 24 hours with other signs; suspected systemic illness
Serum biochemistry panel
BUN and creatinine (kidney function); ALT, ALP, bilirubin (liver function); glucose; electrolytes (sodium, potassium for Addison’s disease); albumin (nutritional status, liver, GI disease)
Any dog with systemic signs or reduced drinking lasting more than 24-48 hours
Urinalysis with specific gravity
Urine specific gravity above 1.030 confirms adequate kidney concentrating ability; below 1.007 in a dehydrated dog suggests kidney disease or diabetes insipidus
Any dog with reduced drinking; essential for kidney disease assessment
Canine parvovirus ELISA (fecal snap test)
Rapid in-house detection of CPV-2 antigen in feces; results in 10 minutes
Any unvaccinated or incompletely vaccinated puppy with vomiting, diarrhea, and not drinking
Abdominal radiographs
Intestinal obstruction (foreign body); abnormal organ size; gas patterns; free fluid
Vomiting dog not drinking; suspected GI obstruction
Abdominal ultrasound
Pancreatitis (hyperechoic peripancreatic fat); kidney architecture; liver; adrenal glands (Addison’s, Cushing’s)
Suspected pancreatitis; systemic disease evaluation; abdominal pain
ACTH stimulation test
Cortisol response to synthetic ACTH; cortisol below 2 mcg/dL pre and post stimulation confirms hypoadrenocorticism (Addison’s disease)
Young to middle-aged dog with episodic weakness, vomiting, sodium/potassium ratio below 27:1
Treatment Options for a Dog Not Drinking
Treatment
Best For
Notes
Intravenous (IV) fluid therapy (crystalloids: Lactated Ringer’s, 0.9% NaCl, Normosol-R)
Moderate to severe dehydration (6% or greater); vomiting dog unable to retain oral fluids; shock; uremia
Gold standard for fluid resuscitation; administered at veterinary hospital; rate and composition determined by degree of dehydration and electrolyte status
Subcutaneous (SQ) fluid therapy
Mild to moderate dehydration (5-8%); chronic kidney disease maintenance; dogs unable to tolerate IV placement
Can be taught to owners for home administration in CKD patients; uses isotonic fluids (Lactated Ringer’s); less effective than IV for rapid rehydration; not appropriate for shock
Maropitant citrate (Cerenia) 1 mg/kg SQ or 2 mg/kg orally once daily
Nausea-associated water refusal; vomiting prevention during hospitalization; motion sickness
Most effective veterinary antiemetic; acts on NK1 receptors in the vomiting center; also has visceral analgesic properties; safe for use in dogs from 8 weeks of age
Oral rehydration solution (low-sodium chicken broth, unflavored Pedialyte diluted 50:50 with water)
Mild dehydration in a dog that will not drink plain water but accepts flavored liquid
Only appropriate if the dog is not vomiting; never use sports drinks (Gatorade) which contain excessive sodium and sugar; never use grape or onion-flavored broths (toxic)
Elevated water bowl
Dogs with cervical disc disease, hip dysplasia, arthritis, or other musculoskeletal pain that makes bending down painful
Simple, low-cost intervention; observe whether the dog drinks normally from a raised bowl; if yes, elevated bowl should become permanent; very large breeds (Great Dane, Irish Wolfhound) benefit from elevated bowls even without evident pain
Water fountain / running water dispenser
Dogs with a preference for moving water; cats; dogs that consistently drink less than their baseline from a static bowl
Many dogs and cats significantly increase intake when offered circulating water; keeps water oxygenated and cooler; requires regular cleaning of filter and reservoir
Wet food or water added to kibble
Dogs transitioning away from dry food; dogs that are mildly ill but still eating
Adding 50-100 mL of warm water to dry kibble increases total daily fluid intake significantly; warm water enhances palatability by releasing aroma; transition gradually to avoid GI upset
Dental extraction and periodontal treatment
Oral pain from dental disease, fractured teeth, or gingival abscess causing water avoidance
Under general anesthesia; dental radiographs guide extraction decisions; post-operative soft food and water should be offered at a comfortable bowl height
Treatment of underlying disease (CKD, Addison’s, pancreatitis, parvovirus, liver disease)
Any dog where reduced drinking is secondary to systemic illness
Restoring the underlying condition is the definitive treatment; water intake typically normalizes once nausea and systemic illness are controlled; specific treatments depend on diagnosis
Age-Specific Considerations for Dog Not Drinking
Puppies (Under 12 Months)
Adult Dogs (1-7 Years)
Senior Dogs (8+ Years)
Breed-Specific Considerations
Breed / Group
Primary Risk
Key Notes
Standard Poodle, Portuguese Water Dog, Soft Coated Wheaten Terrier
Protein-losing nephropathy (PLN); early-onset CKD
Glomerular disease causes protein loss in urine and progressive kidney dysfunction; reduced drinking may be an early or late sign; annual urinalysis with urine protein:creatinine ratio recommended from age 2-3
Great Dane, Doberman Pinscher, Rottweiler
Dilated cardiomyopathy (DCM) causing reduced activity and secondary hypodipsia; gastric dilatation-volvulus (GDV) causing acute water refusal
Any large or giant breed dog refusing water with a distended or tense abdomen should be taken to emergency immediately for GDV evaluation
West Highland White Terrier, Cairn Terrier, Scottish Terrier
Copper-associated hepatopathy causing liver disease and secondary water avoidance
These breeds have a genetic predisposition to copper accumulation in the liver; reduced appetite and drinking with jaundice in a Westie should prompt liver evaluation
Labrador Retriever, Golden Retriever, Bearded Collie
Addison’s disease (hypoadrenocorticism)
These breeds are over-represented for Addison’s disease; episodic vomiting, weakness, and not drinking in a young to middle-aged dog of these breeds warrants electrolyte testing
Brachycephalic breeds (Bulldog, Pug, French Bulldog)
Increased water loss through panting due to BOAS; higher risk of heat-related dehydration
Brachycephalic dogs rely heavily on evaporative cooling through panting; they lose more water through respiratory evaporation and need access to fresh water at all times, especially in warm weather
Cost to Evaluate and Treat a Dog Not Drinking
Service / Treatment
Typical US Cost
Veterinary exam
$60-$150
CBC and serum chemistry panel
$150-$350
Urinalysis with specific gravity
$50-$120
Parvovirus snap test
$30-$80
Abdominal ultrasound
$200-$500
ACTH stimulation test (Addison’s)
$150-$350
IV fluid therapy, per day (hospitalization)
$400-$900
Subcutaneous fluids (outpatient)
$50-$150 per visit
Maropitant (Cerenia) injection
$25-$60 per dose
Dental extraction under anesthesia
$300-$1,500 depending on complexity
Myths and Facts About Dogs Not Drinking
Frequently Asked Questions About Dogs Not Drinking Water
How long can a dog go without drinking water?
My dog stopped drinking after switching food. Is that normal?
Can I add something to my dog’s water to make it drink more?
Why does my dog drink from puddles but not the water bowl?
Should I be worried if my dog is not drinking but is still eating normally?
Does a dog drink less in cold weather?
How do I get my sick dog to drink water?
Reviewed by a Licensed Veterinary Doctor (DVM)
Two Quick Home Tests for Dehydration
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