As a rule of thumb, a cat drinks around 50 ml of water per kilogram of body weight per day. A cat weighing 4 kg therefore has a total fluid requirement of about 200 ml per day. But here is the important part: that number covers all the fluid the cat takes in - both what it drinks from the bowl itself and the water already present in its meal. That is why the amount in the water bowl alone doesn't tell you much until you know what your cat eats. How much a cat drinks per day depends first and foremost on whether it lives on dry or wet meals.
How meal and fluid requirement are connected
By nature, the cat is a predator that covers most of its fluid requirement through its prey. A natural prey such as a mouse consists of around 70-75% water, and the cat's body is designed to get its fluid that way. This is the explanation for why cats have a relatively weak sense of thirst compared to dogs, for example: evolutionarily, they have rarely needed to drink large amounts because the food itself provided the fluid.
This means that a cat living on wet meals such as PÂTÉ often drinks very little from the water bowl - simply because it already gets most of its fluid through its food. A PÂTÉ can contain around three quarters water, and that alone can cover a large part of the requirement. If, on the other hand, the cat lives on dry meals, which contain very little water, the entire rest of the fluid requirement must be covered by drinking. That cat will therefore quite naturally visit the water bowl far more often. Both can be perfectly fine - what matters is the total fluid intake, not how much you see the cat drink.
What else affects how much a cat drinks
In addition to the water content of the meal, several everyday factors come into play. Hot days and dry indoor climates increase the requirement because the cat loses more fluid. Activity level does the same: a cat with a high activity level that plays and moves a lot has a greater fluid loss than a cat with a more moderate everyday life. The life stage also matters - a growing kitten and a senior cat may have different needs than an adult cat in its prime.
The amount can also vary from day to day without anything being wrong. If the cat ate an extra moist meal yesterday, it may drink less today. What you should keep an eye on is not the individual day, but the general pattern over time.
How to get your cat to drink more
If your cat lives on dry meals and you want to increase its fluid intake, there are several simple tricks. Make sure there are several water bowls around the home so water is always within reach. Many cats prefer fresh water and turn up their nose at water that has been standing too long, so change it daily. A wide, shallow bowl where the whiskers don't touch the edge appeals to many cats, and some drink more from a water dish than from a deep cup.
The placement also matters. Cats don't like to drink right next to their food or close to the litter box, so give the water its own quiet spot. An effective trick is to let some of the meals come from wet food. By offering PÂTÉ as part of the diet, you boost the cat's total fluid intake without the cat needing to drink more. The same applies if you mix a little extra water into the wet meals.
When you should react to your cat's drinking habits
A sudden and persistent change in how much your cat drinks is worth taking seriously - whether it starts drinking markedly more or markedly less than usual. A cat that suddenly hangs over the water bowl or empties it far faster than usual is telling you something, and so is a cat that stops drinking. Signs of dehydration, such as lethargy or a cat that seems unwell, should also prompt you to act.
This is where the line goes for what you should assess yourself. If you are worried about your cat's health, or you notice a clear change in its drinking habits that cannot be explained by heat or a change in diet, then contact your vet. Precisely because cats naturally drink little and often don't show that something is wrong, your own observations of the everyday pattern are an important tool. If you know your cat's normal rhythm, you will also notice when something stands out.
Fluid and nutrition are connected
Water is part of the overall picture of what your cat takes in, and here the quality of the meals counts just as much as the quantity. At ESSENTIAL FOODS, our cat meals are composed of human-grade ingredients and fresh raw materials, so the cat gets a nutritional profile that matches its needs as the predator it is. If you want to provide some of the fluid through wet meals, you'll find exquisite options among our pâté for seniors and in the rest of the cat meals collection homepage. For the senior cat, which has its own needs in its golden years, we have gathered suitable meals under meals for senior cats.
If you are in doubt about how best to compose your cat's meals based on its life stage, taste and needs, ESSENTIAL FOODS' nutrition advisors are ready to help by phone, chat or email. They advise on feeding, food and nutrition, so you can make the right choice for your particular cat - and thereby also give it the best starting point for having its fluid requirement covered every single day.