How to Get a Cat to Drink More Water

The short answer

The single biggest lever for getting a cat to drink more water is not a bowl or a fountain. It is wet food. A cat on canned food takes in most of its daily water without drinking at all, which is exactly how its ancestors did it. After that, in rough order of impact based on our research and owner reports: a fountain, more water stations in more rooms, a wide bowl that does not press on the whiskers, and flavoring the water with a splash of tuna water or an onion-free broth.

This guide is part of our hydration hub. It explains why cats are bad at drinking, what “enough” looks like, and how to check at home whether any of this is working. It also covers the one thing every article on this topic should say plainly: a cat that suddenly drinks a lot more is not a hydration success story. That is a vet visit.

Why cats drink so little

Domestic cats descend from the African wildcat, a small desert hunter. In that environment, standing water is rare, and a mouse is roughly 70 percent water. Cats evolved to get their fluid from prey and to concentrate their urine heavily to hold on to what they had. Their thirst drive is famously weak; a mildly dehydrated cat often just does not feel thirsty the way a dog or a person would.

Then we moved them indoors and handed many of them a bowl of dry kibble, which is under ten percent water. The cat’s instincts say “I got my water from dinner.” Dinner did not have any. The result is a lot of cats that live in a mildly under-hydrated state, concentrate their urine even further, and drink a bowl of water a week when they should be drinking closer to a bowl a day.

None of this means a dry-fed cat is doomed. It means the deck is stacked, and most of what follows is about unstacking it.

How much water does a cat need?

General veterinary guidance puts a cat’s total water need at roughly 50 to 60 ml per kilogram of body weight per day, from all sources combined. For a typical 4.5 kg (10 lb) cat that works out to somewhere around 225 to 270 ml, or about one cup, per day.

The phrase “from all sources” is the important part. A cat eating two 85 gram (3 oz) cans of wet food a day gets roughly 130 to 140 ml of water from the food alone, more than half the target, before drinking a drop. A cat on dry food gets almost nothing from food and has to drink nearly the whole amount.

Treat this as a ballpark, not a rule. Activity, temperature, age, and health all shift it, and your vet may give you a different target for your cat. What the number is useful for is perspective: if your dry-fed cat drinks a few sips a day, it is likely well short.

The levers, ranked by impact

1. Wet food

If you change one thing, change this. Switching a cat from all dry to all wet, or even to half wet, moves water intake more than every other item on this list combined. Most canned foods are 75 to 80 percent moisture.

If your cat is a kibble devotee, transition slowly over a week or two by mixing a little wet into the dry and shifting the ratio. Some cats take to it immediately; others need the wet food warmed slightly or offered at a different time of day than the dry. If your cat refuses all wet food, adding water to the kibble to make a slurry is a fallback that some cats accept.

Two notes. First, talk to your vet before changing diet if your cat has any existing condition, since some cats are on a particular food for a reason. Second, wet food left out all day spoils; feed it in meals.

2. A fountain

Moving water reads as fresh to many cats, and owners consistently report cats that drink noticeably more from a fountain than from a bowl. This is the biggest lever after food for a cat that will not eat wet, and a useful add-on even for one that does.

We recommend the Eversweet Max because the stainless top is easy to keep clean and the cordless base lets you place it where your cat spends time rather than where the outlet is. A fountain that is never cleaned is worse than a clean bowl, so pick one you will actually maintain. Our full comparison, including a cheaper plastic option, is in best cat water fountains.

3. More water stations

Cats drink opportunistically. A cat walking past water is far more likely to stop for a sip than a cat that has to go find it. One bowl in the kitchen serves the kitchen. A bowl in the bedroom, one near the favorite sunny window, and a fountain in the living room serve the whole house.

4. Bowl material and width

Two things about the bowl itself matter.

Width. Whiskers are sensitive. A cat drinking from a deep, narrow bowl has to push its whiskers against the sides, and some cats find that unpleasant enough to drink less or to paw water out onto the floor instead. The usual term is whisker fatigue. Whether that is the precise mechanism or not, owners report that a wide, shallow dish or saucer often gets more use than a deep bowl. Aim for a bowl wider than the cat’s whiskers.

Material. Plastic scratches, scratches hold biofilm, and biofilm makes water taste stale and is linked in owner reports to chin acne. Stainless steel, glazed ceramic, or glass are all better. We compare them in stainless vs ceramic vs plastic fountains; the same logic applies to bowls.

5. Flavored water and toppers

A little flavor goes a long way with some cats.

• Tuna or salmon water. The liquid from a can of tuna packed in water (not oil, not brine) diluted into a bowl of fresh water. Many cats will drink the whole bowl.
• Broth. A low-sodium chicken or bone broth with no onion, no garlic, and no chives. Onion and garlic in all forms, including powders, are toxic to cats. Read the label; most human broths contain one or both. Pet-specific broths exist and skip the problem.
• Water toppers and hydration supplements. Commercial products designed to be mixed into water or poured over food. Owners report mixed results, and they are mostly flavor. They are worth a try if the tuna water trick worked and you want something shelf-stable.

Offer flavored water in addition to plain water, not instead of it, and dump it after a few hours. It spoils faster than plain.

6. Ice cubes and temperature

Some cats like to fish ice cubes out of a bowl and end up drinking in the process. Others prefer cool water and will drink more from a bowl that has had an ice cube in it. Plenty of cats could not care less. It costs nothing to try. A few cats prefer slightly warm water, particularly older cats; a splash of warm water from the kettle into the bowl is worth testing if cold gets no response.

7. Freshness and routine

Water that has sat for two days with a film of dust on it is not appealing to a cat, even if it looks fine to you. Change bowls daily. Wash them with soap, not just a rinse, every couple of days. If your cat comes running when you turn on a tap, that is a cat telling you your bowl water is not fresh enough.

How to measure water intake at home

You cannot manage what you cannot measure, and “I think she is drinking more” is not something you can act on. Here is a method that takes a minute a day.

What you need

A kitchen scale that reads in grams, one bowl per water station, and a notebook or a note on your phone.

The method

1. Fill each bowl with fresh water and weigh it on the scale. Write down the weight.
2. Twenty-four hours later, weigh it again before refilling. The difference in grams is the milliliters drunk, since a milliliter of water weighs a gram.
3. Add up all the bowls. Subtract an estimate for evaporation: set out one identical bowl the cat cannot reach for a day and see what it loses. In most homes that is a few grams, more in summer or near a heat vent.
4. Do this for a week to get a baseline. Then make one change (wet food, fountain, new bowl) and measure another week.

For a fountain, weigh the whole thing full, then again a day later. It is clumsy but it works. Some fountains show a level indicator that is good enough for trend spotting.

What to do with the number

Compare it against the food. If your cat eats wet food, add roughly 75 to 80 percent of the food’s weight as water. If the total is anywhere near the general guidance of 50 to 60 ml per kg, and the cat is otherwise well, you are fine. If the drinking number jumps sharply week over week without any change on your end, that is the signal to call the vet, and the notebook is exactly what the vet will want to see.

In a multi-cat home

You cannot easily tell who drank what from a shared bowl. A camera pointed at the water station helps, and so does a period of separating cats at night with their own bowls. If one cat is the concern, the vet can measure urine concentration directly, which is a better test than anything you can do with a scale.

Who should not push water intake

Most cats benefit from drinking more. A few situations need a vet’s input first.

If your cat has been diagnosed with a heart condition, some vets manage fluid intake carefully, and aggressive hydration pushes are not automatically good. If your cat is on a prescription urinary diet, changing the food, even to a wetter version, should be a vet conversation, since the diet is formulated around a specific mineral balance. And if you are pushing water because your cat has stopped drinking and seems unwell, do not push; get the cat seen.

When more drinking is a warning sign

This is the section we most want you to read. Increased thirst, the technical term is polydipsia, is one of the most common early signs of serious disease in cats, and it is easy to mistake for a hydration win.

Three conditions come up most often.

Chronic kidney disease. Extremely common in older cats. Failing kidneys cannot concentrate urine, so the cat pees more and drinks more to compensate. Early kidney disease is manageable, and catching it because you noticed the water bowl emptying faster is a genuinely good outcome.

Diabetes. Excess sugar in the blood pulls water into the urine. Cats with diabetes drink and pee a lot, often lose weight while eating well, and may develop a flat-footed walk. Overweight, middle-aged, indoor cats are the typical profile.

Hyperthyroidism. An overactive thyroid ramps up metabolism. The cat eats ravenously, loses weight, drinks more, and may be restless or vocal at night. Also mostly a disease of older cats.

All three are diagnosed with routine bloodwork and a urine sample. None of them is something a fountain, a bowl, or a broth addresses, and all three are much better caught early. If the drinking change coincides with weight loss, more frequent or larger clumps in the litter box, vomiting, or a change in coat, do not wait for the annual checkup.

On the litter side, a color-changing silica litter can sometimes flag a urine change worth mentioning to the vet; we cover what it can and cannot tell you in best litter for urinary crystals.

Where to go next

Start with wet food, add a fountain, spread water around the house, and measure for a week. If you are choosing a fountain, best cat water fountains compares the two we recommend, and stainless vs ceramic vs plastic explains why the material matters. Everything in this pillar lives in the hydration hub.