Cat not drinking water: should you worry?
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Before you worry about your cat not drinking water, check what they eat. A cat on wet food gets 75 to 80% of their water from their diet: it's perfectly normal to almost never see them drink. The real warning sign isn't “they don't drink” — it's a sudden change, one way or the other.
How much should a cat drink?
The accepted ballpark is around 50 to 60 ml per kilo per day, from all sources combined. For a 4 kg cat, that's 200 to 240 ml a day.
But that total includes the water in their food, and the difference is considerable:
| Diet | Water supplied by food | What they need to drink on top |
|---|---|---|
| Wet food only | 75 to 80% | Very little — often unseen |
| Mix of wet and dry food | Variable | Moderate |
| Dry food only | Less than 10% | Almost all of it |
In other words: if your cat eats wet food and you never see them drink, there's probably nothing to fix. If they eat dry food and you never see them drink, it's worth taking a closer look.
Why cats drink little by nature
The domestic cat is descended from wild cats of arid habitats, who got their water from their prey. They've kept a weak sense of thirst: where a dog naturally makes up for a lack of water, a cat only partly does.
So this isn't a behavioural flaw to correct, but a trait of the species that you have to work with — by making water more available and more appealing, rather than trying to force them.
The five reasons behind a cat not drinking water
1. The bowl is too close to the food
This is the most common cause and the easiest to fix. In the wild, water near a carcass is contaminated water: the instinct has stuck. Move the water bowl away from the food bowl, ideally into another room.
2. The bowl is too narrow or too deep
When their whiskers brush against the sides, many cats cut their drink short or give up. A wide, shallow bowl sorts this out straight away. It's also why some cats prefer to drink from a wide glass or from the bathroom sink.
3. The material
Plastic scratches with use, and the micro-scratches hold on to a residue that your cat notices before you do. It can also trigger a skin reaction on the chin in some cats. Opt for ceramic, glass or stainless steel.
4. The water is stale
Still water warms up, loses its oxygen and collects dust and hair within a few hours. Change it once or twice a day, and rinse the bowl daily — not just when it looks dirty.
5. There's only one water station
A cat drinks where they happen to be, not where someone decided their bowl should go. Adding more water stations around the home is the most effective and cheapest step there is.
What you can do today, without buying anything
- Add two water stations in different rooms, away from the food bowls.
- Change the bowl: a wide, shallow one, in ceramic or stainless steel.
- Change the water morning and evening, rinsing the bowl each time.
- Add moisture to their food: a tablespoon of lukewarm water in their wet food, or a little soaked kibble. It often makes the biggest difference of all.
- Try running water: let a trickle run from the tap and watch. If they come running, you have your answer about what they prefer.
Give these five steps one to two weeks before you think about buying anything. A lot of situations are resolved at this stage.
Getting water in through food: what works best
If there's just one thing to remember, it's this: it's far easier to increase the water a cat takes in than to persuade them to drink more. Their thirst drive is weak, but their appetite isn't.
Switch part of their diet to wet food. Replacing even one dry-food meal with wet food radically changes their water balance — you go from less than 10% water to 75–80% for that meal. It's the single most effective measure on this page.
Add lukewarm water to wet food. One to two tablespoons, mixed in. Lukewarm, because warmth brings out the aromas and makes the whole thing more appetising. Most cats accept it without noticing a thing.
Soak the kibble. A few minutes in a little lukewarm water. Some cats refuse the softened texture: start with a small proportion mixed in with dry kibble.
Homemade broth, with no salt or onion. The cooking water from chicken or fish, unsalted and cooled, poured over their food. Be careful: no salt, no onion, no garlic and no shop-bought stock cubes — those are far too salty, and onion is toxic to cats.
Whatever you try, go gradually. A cat faced with a new texture overnight will often refuse the whole meal, and a cat who skips meals is a more serious problem than the one you were trying to solve.
Homes with more than one cat
A situation that almost always goes unnoticed: in a multi-cat home, one cat can drink markedly less than the others without anything showing.
The reason is social. A single water station becomes a controlled resource, and the dominant cat blocks access to it — not necessarily through aggression, often just by being nearby. The subordinate cat waits, then gives up.
The fix is simple: one water station per cat, plus one, spread across different rooms and out of sight of each other. Three cats, four water stations. It's also why keeping a bowl as well as a fountain is still recommended when there are several animals.
A useful clue: if one of your cats makes a point of drinking from the tap, the shower or a glass, they may simply be avoiding the shared water station.
When a fountain becomes the right answer
If your cat eats dry food, drinks from the tap or the shower, or if you have several cats, moving water offers something no bowl can: continuous circulation, filtration with every pass, and water that stays fresh.
One honest caveat, though, since we sell them: real-world observations point towards cats drinking more, but the studies are mixed and the effect varies a lot from cat to cat. It isn't a medical device.
The quiet USB fountain is the default choice, with three pump settings, two of them designed to run at night. The ceramic version is aimed at homes where the fountain stays on show and at long-haired cats, as the material doesn't hold on to odours or residue. The full bowl-versus-fountain comparison is in water fountain or bowl.
For a cat who snubs the water bowl
Some cats drink more when the water moves: its quiet pump keeps it flowing, and the filter cartridge catches hair and dust on every pass. Discover the quiet water fountain →
When to see a vet
Some signs have nothing to do with how things are set up and need a vet's opinion quickly.
- A cat who suddenly starts drinking much more than before. This is the most important signal of all: it can accompany kidney problems, diabetes or a thyroid disorder.
- A cat who abruptly stops drinking when they used to drink regularly.
- Straining or repeated trips to the litter tray, especially in male cats — this is an emergency.
- Lethargy, loss of appetite or weight loss alongside.
- The skin tent test: gently pinch the skin between the shoulder blades. If it doesn't spring straight back into place, dehydration has already set in — see a vet without waiting.
In all these cases, changing the bowl won't be enough and would only delay the diagnosis.
Frequently asked questions
My cat drinks from the shower or the tap — is that a problem?
It's not a problem, it's a clue: they're telling you they prefer fresh, running water to the still water in their bowl. That's exactly the kind of cat for whom a fountain really makes a difference.
Can you give milk to a cat who won't drink?
No. The vast majority of adult cats digest lactose poorly, and milk causes digestive upsets without solving the hydration problem. Special cat milk is a calorie supplement, not a source of water.
Should you give tap water or bottled water?
Tap water is fine in most cases. If it's heavily chlorinated, leave it to stand in the open air for an hour before serving it: the smell of chlorine puts some cats off.
My cat drinks a lot in summer — is that normal?
Yes, their needs go up with the heat. What should worry you is consumption that stays high outside hot spells. The summer-specific measures are in keeping your cat hydrated in summer.
How can I tell how much they really drink?
Measure the water you pour in the morning, then what's left 24 hours later, allowing for evaporation — significant in summer. Do it over three days to even out the variations. It's the only way to get an objective picture, rather than relying on the feeling that you “never see them drink”.