Why Does my Cat Drink so Much Water?

cat drinks

If your cat has started drinking a lot more water than usual, there is a reason behind it.

While it isn’t necessarily a sign of a serious problem, it could be.

This is why you need to learn about some of the most common explanations for this.

How Much Water do Cats Normally Drink?

Not all cats drink the same amount of water on a daily basis. These animals typically consume anywhere from 3.5 to 4.5 ounces of water for every five pounds of body weight each day. A ten pound cat will consume 7 to 9 ounces of water. If you aren’t sure how much water your cat should be drinking on a daily basis, you can always ask your vet.

Reasons for Excessive Drinking

There are several different reasons why your cat might be consuming more water than usual that you’ll want to know about.


If your cat is gulping down a lot more water than usual each day, they could have diabetes. This condition is more common among these animals than you might think. Cats that become severely overweight tend to be at a high risk for developing diabetes. This condition cannot be cured, but it can be managed with daily insulin injections.

Cats can have either type 1 or type 2 diabetes. First type is when the cat’s body is not producing enough insulin. The second type is similar to that of human beings (their body becomes insulin resistant).

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A majority of cats that develop diabetes are over the age of five, but there are exceptions. It is more common for male cats to get diabetes. Your veterinarian will be able to confirm this with a simple blood and/or urine test.

kitten water

Kidney Disease

It is also possible that your cat has kidney disease, which results in an ability to reabsorb water. This ultimately leads to an unusual amount of water being expelled when they urinate. 

In an attempt to stay hydrated, your cat keeps drinking more water. This is a vicious cycle that can do a lot of damage to your pet over time.

Other signs of kidney disease in cats include frequent bacterial infections, weight loss, decreased appetite, frequent urination, and bad breath.

Your vet can run a blood test to determine if your cat has Disney disease. There are various medications that can help with the symptoms. You will likely have to put your cat on a special diet as well.


Excess drinking of water is just one of the signs that your cat might have hyperthyroidism. Some of the other symptoms of this condition include increase appetite, increased heart rate, diarrhea, vomiting, matted coat. If you notice these symptoms, you should take your cat to the vet right away.

This condition occurs when a cat’s thyroid produces too much of a certain hormone. This speeds up the metabolism, which in turn can result in rapid weight loss. It is a fast moving condition that can do a lot of harm to your pet if you don’t stay on top of it. There are certain medications that have been known to help with managing hyperthyroidism in cats.

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Their Food is too Dry

There is also a possibility that the food you are giving your cat each day is simply too dry for them. You might want to try giving them wet food for a while to see if it makes a difference. Many cats can be very finicky when it comes to what they will eat. It might take a little bit of trial and error to find a food they are truly happy with. Check this article to get help with choosing your cat’s food.

cat drink water

What You Should do About Your Cat’s Excessive Drinking

There are a few steps that you should take if your cat is drinking way more water than normal.

Look for other Signs

The first thing you want to do is look for other signs that there might be a serious problem with your cat.

Some of these signs include:

  • Vomiting
  • Diarrhea
  • Lack of appetite
  • Increases appetite
  • Lethargy (especially if they are usually energetic)
  • Blood in urine
  • Sleeping more or less than usual
  • Sudden changes in behavior

All of these things could be a sign that your cat has a serious health problem that needs to be diagnosed. You should take them to get looked at by your vet immediately. The longer you wait to do this, the worse off your pet is going to be.

Collecting a Urine Sample

If you are going to take your cat into the vet to get examined, you might need to bring a urine sample. All you have to do is empty and clean their litter box, and put in litter material that is highly absorbent. Put the urine in a clean container (you can get one from your vet).

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Your veterinarian will run some tests with the urine to determine if there are any serious health issues that are causing the increased thirst. They will most likely also draw blood for your cat for further testing.


  • While increased thirst doesn’t necessarily mean that your cat has a serious health problem, it is possible.
  • Most cats drink anywhere from 3.4 to 4.5 ounces of water for every five pounds of their body weight daily.
  • Increased water consumption is a common symptom of diabetes, which affects many cats.
  • Kidney disease is another common explanation for a cat drinking more water than usual.
  • Try giving your cat a wet food instead of a dry one to see if it makes a difference in terms of their water consumption.
  • It is important that you take your cat to the veterinarian if you notice any symptoms of the above conditions.
  • If your cat is drinking a lot more water than usual, you do not simply water to ignore it.
  • Changes in mood, appetite and overall behavior can be signs that your cat’s water consumption is symptomatic of a bigger problem.
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