Why Is My Dog Drinking Water but Refusing Food?

Stress and Environmental Changes

Changes in a dog's surroundings or daily routine, such as moving to a new home, receiving unfamiliar visitors or switching to a different food, can temporarily affect their appetite. Some dogs may eat less when anxious or unsettled, although their usual drinking habits remain unchanged.

Dental Problems and Physical Discomfort

Dental disease, mouth injuries or other oral problems can make chewing painful, while not affecting drinking. Nausea, digestive illness or pain elsewhere in the body can also reduce a dog’s appetite without necessarily affecting their willingness to drink water.

Underlying Medical Conditions

Illnesses affecting internal organs, including kidney or liver disease, can reduce a dog's appetite. Certain conditions may also cause increased thirst, meaning a dog could be drinking more than usual despite eating less. These changes warrant veterinary assessment to identify the underlying cause.

What Should You Look for When Your Dog Is Not Eating but Still Drinking?

If your dog has lost interest in food, it helps to keep an eye on their other habits and behaviour. Changes in how much they eat or drink, along with any new symptoms, can provide useful clues about what might be wrong. Sharing these observations with your veterinarian can also help them assess the possible cause.

Some changes to look out for include:

• Changes in appetite: Note whether your dog is eating smaller portions, accepting treats but refusing regular meals or avoiding food entirely. Record when they last ate normally and whether the change was sudden or gradual.
• Behaviour around food: Watch whether your dog approaches their food but struggles to chew, drops food from their mouth or walks away without even attempting to eat.
• Increased water intake: Look for more frequent visits to the water bowl, noticeably larger amounts consumed or the need to refill it more often. You can measure their daily water intake, but should never restrict access to water.
• Changes in urination: Pay attention to more frequent urination, larger amounts of urine or unusual incontinence indoors.
• Other physical or behavioural changes: Watch for vomiting, diarrhoea, lethargy, signs of pain or unusual changes in behaviour.

When Should a Dog That Is Drinking but Not Eating See a Vet?

A dog continuing to drink water does not necessarily mean that their loss of appetite is harmless. Veterinary attention may be needed depending on how long they have refused food, whether they can still drink normally and whether other concerning symptoms are present.

Persistent Refusal to Eat

A healthy adult dog missing a single meal while otherwise behaving normally may not require emergency treatment. However, if your dog has eaten nothing for around 24 hours, contact a veterinarian for advice rather than continuing to wait for their appetite to return.

Puppies, senior dogs and those with existing medical conditions may require earlier assessment. This is particularly important for dogs with diabetes, as missed meals can complicate blood sugar management and medication schedules.

Refusal to Drink Water

If your dog stops drinking water altogether, seek veterinary advice promptly, particularly if they are also refusing food. Inadequate fluid intake can lead to dehydration, and the risk increases if your dog is experiencing vomiting, diarrhoea or other fluid losses.

Signs of dehydration may include dry or sticky gums, sunken eyes and unusual weakness. Do not wait for these signs to develop before contacting a veterinarian, as a dog that is unable or unwilling to drink may require medical attention to maintain adequate hydration.

Showing Symptoms Requiring Emergency Veterinary Care

Some symptoms warrant immediate veterinary attention regardless of how long your dog has been refusing food. These include:

• Repeated vomiting or inability to keep water down, which can quickly lead to dehydration.
• Severe weakness, collapse or unresponsiveness, which may indicate a serious underlying problem.
• Difficulty breathing, particularly if accompanied by distress or unusual weakness.
• A swollen or painful abdomen, especially with repeated unsuccessful attempts to vomit, which may indicate a life-threatening emergency.
• Suspected poisoning, even if severe symptoms have not yet developed.

If your dog displays these signs, seek emergency veterinary care immediately.

FAQs About Dogs Not Eating but Still Drinking Water

Should I offer my dog a different food if they refuse their usual meal?

You can try offering a small amount of another familiar, dog-safe food to see whether your dog is willing to eat. However, avoid repeatedly switching foods or offering large amounts of treats, as sudden dietary changes can cause digestive upset.

Is it safe to add broth or food toppers to encourage my dog to eat?

Yes, a small amount of plain, dog-safe broth or a suitable food topper may make a meal more appealing. Choose products without onion, garlic, excessive salt or other harmful ingredients.

Should I force-feed my dog if they have stopped eating?

No. You should not force-feed your dog unless specifically instructed by a veterinarian. Forcing food into their mouth can cause distress, increase the risk of choking or aspiration and worsen discomfort if they are nauseated. If your dog refuses food despite gentle encouragement, seek veterinary advice to address the underlying problem.

Should I continue giving my dog medication if they are not eating?

If your dog stops eating while under medication, you should check with your veterinarian before giving them subsequent doses. Some medicines need to be taken with food to reduce stomach irritation, while others, particularly insulin and certain diabetes medications, may require changes to the treatment plan if meals are missed. Do not independently stop, skip or adjust prescribed medication without veterinary guidance.

Meet Our Veterinarian

Dr Nicholas Woo
Consultant Vet and Surgeon
BVSc (Hons) MANZCVS (Small Animal Surgery)

Dr Nicholas Woo is a consultant vet and surgeon with advanced training in small animal surgery and oncology. His clinical interests include soft tissue surgery, orthopaedics, oncology, spinal surgery, hip replacement and critical care.

In 2017, Dr Woo founded Advanced Vetcare with the aim of providing accessible, high-level veterinary care supported by modern medical facilities and round-the-clock emergency services in Singapore.

Dr Woo has also presented at numerous veterinary meetings, where he shares his knowledge and experience with fellow professionals while contributing to ongoing developments in veterinary medicine.

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