Why Is My Dog Drinking So Much Water?

Why Is My Dog Drinking So Much Water?

It is common for owners to notice when their dog starts visiting the water bowl more frequently. While sometimes it is just a hot day or extra exercise, a sudden, persistent increase in thirst—medically known as polydipsia—can be a sign that your dog’s body is trying to tell you something important.

How much water is too much?

Most dogs drink between 20 to 50 milliliters of water per kilogram of body weight each day. If you notice your dog is consistently emptying their bowl faster than usual, or if you find yourself refilling it multiple times a day, it is worth paying closer attention.

To get a better idea of what is normal for your dog, try measuring how much water you put in their bowl over a 24-hour period. This information is incredibly helpful for your vet if you decide to book an appointment.

What are the common causes of increased thirst?

Increased thirst is often a symptom of an underlying condition rather than a disease itself. Some of the most common reasons include:

• Diabetes: Just like in humans, diabetes can cause dogs to drink more and urinate more frequently.
• Kidney Issues: When kidneys aren't functioning at their best, they may struggle to concentrate urine, leading to increased water loss and a compensatory need to drink more.
• Cushing’s Disease: This hormonal imbalance can cause a variety of symptoms, with excessive thirst and hunger being two of the most common.
• Medications: Certain drugs, such as steroids, can cause a temporary increase in thirst.
• Infections: Conditions like a urinary tract infection (UTI) can sometimes lead to changes in drinking habits.

When to call your vet

While a one-off day of extra drinking after a long hike is usually nothing to worry about, you should contact your vet if you notice any of the following:

• The increased thirst has lasted for more than 24–48 hours.
• Your dog is also urinating more frequently or having accidents in the house.
• You notice other changes, such as lethargy, weight loss, a change in appetite, or vomiting.
• Your dog seems generally "off" or less energetic than usual.

When you call, be prepared to tell your vet how long this has been going on and if you have noticed any other behavioral changes. This article is educational and isn't a substitute for veterinary advice. If you're worried about your dog, call your vet.