dog drinking a lot of water

Why Is My Dog Drinking A Lot Of Water?

Have you ever noticed how much water your dog usually drinks per day? Normally, dogs drink about 30 ml. or 1.01 ounces of water per pound of weight every day.

The level of thirst or water absorbing requirement depends on many factors, including weight, environment, weather or simply a dog's diet. However, it can be all about diseases and disorders.

Let’s look at the following reasons and you will find out why your dog is drinking a lot of water.


A dry diet usually includes only 5% to 10% water, leading to dogs thirst. This happens to humans as well as dogs. Diets with high sodium levels can influence your dog to drink more water than usual.

One more thing to notice in your dog’s diet is salt. Large quantities of salt can be harmful for dogs. Human food that contains salt in a large amount, like crisps, should never be added to dog’s diet. Some common symptoms of too much salt ingestion in dogs include:

  • Tremors
  • Diarrhea
  • Depression
  • Vomiting


As mentioned above, the environment and weather can be reasons for your dog’s dehydration. In hot summer months, your dog will dehydrate faster, especially if its active. In this situation the dog is more likely to suffer from illness or infection. Common symptoms include:

  • Getting lethargic
  • Dry gums and tongues
  • Thick and jelly-like saliva

When you diagnose that your dog is suffering from mild dehydration with no vomiting, some initial steps should be taken.

  • Offer him small amounts of clean water: 1 teaspoon for a little dog and 1-2 teaspoons for bigger dogs.
  • Keep doing this every 10 minutes over the next few hours.
  • Keep them away from free access to a lot of water.

If vomiting or any other more serious symptoms happen, taking a dog to a vet is the best option.

Illness and Diseases

There are many diseases and illnesses that cause a dog to drink too much water. Some common ones include:

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    Liver Disease
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    Cushing's disease
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    Kidney Disease

It is important to focus on the 3 following diseases:

1. Diabetes Mellitus

The usual reason for diabetes is a low production of insulin, or the body not responding to insulin anymore. Looking for glucose (sugar) in the urine or a high blood sugar can be a good way to consider this illness. If the blood sugar goes over 200, glucose appears in the urine. Check out here for testing your dog’s urine at home.

Diabetes mellitus in dogs can be treated by injecting insulin twice a day under your vet’s guidance and supervision. For ketoacidosis cases, intensive treatment in hospital is required for 3-5 days. One thing to know is that a higher fiber diet might help improve the situation.

2. Kidney Disease

To diagnose kidney disease, blood tests and urinalysis should be tested to see if your dog suffers from a simple injection or more severe deterioration of kidney function.

Along with treatment from your vet, a prescription diet with restricted, high-quality protein, and limited phosphorous should be implemented.

3. Cushing’s Disease

The root cause of this disease is that adrenal glands make too much cortisol, causing a kind of hormone that affects the water regulation system in your dog’s body. Consequently, more urine leads to more drinking water.

Cushing’s disease slowly develops with less urgency level than diabetes or kidney disease. It can be diagnosed by advanced blood tests and ultrasound..


Some drugs can also cause your dogs to drink much more water than usual:

  • Anti-inflammatory drugs, namely prednisone. This is often used for asthma, allergies, and inflammatory bowel disease;
  • Heart failure drugs, namely furosemide. The side effect of this drug is need to urinate that cause need for more water;
  • Seizure medication, namely phenobarbital, causing excessive thirst in dogs.

Water consumption is a natural and necessary part of life, including your dog’s. You need to keep an eye on your dog's water regulation and if there are any symptoms, in this case drinking too much water, you can check one by one we have listed and proceed as advised.

How To Track Your Dog’s Water Regulation

For example, a 25-pound dog:

(Divide your dog’s weight in pounds by 2.2 to get his weight in kilograms)

  • paw
    25lbs/2.2 = 11.36 kg
  • paw
    11.36kg x 100ml = 1,136 mls
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    1,136 mls = 1 liter, 136mls of water per day

Hope we helped you find an answer  to your question: why is your dog drinking too much water.

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