Long viewed merely as a supplement to dry food or as a "treat" meal, wet food can actually serve as a proper daily diet for cats—provided you choose the right product.
And that is precisely where things get complicated.
Mousse, pâté, shredded cuts, chunks in gravy, fillets, soups… Shelves offer a multitude of options, with packaging highlighting meat, fish, "natural," or "grain-free" labels, or recipes that look almost like meals intended for humans.
But an appetizing wet food rich in nice chunks is not necessarily nutritionally complete.
Before looking at the photo on the can, you must start with some much more important information.
Complete or complementary food: the first thing to check
This is probably the most important criterion when choosing a wet food meant to be given regularly.
A wet food may be labeled as:
complete feed
or
complementary feed.
A complete feed is formulated to provide all the nutrients a cat needs when used as directed.
A complementary feed, however, is not designed to serve as the cat’s sole daily diet.
This distinction is fundamental.
Some particularly attractive cans, composed for example of pieces of chicken or fish in broth, may seem excellent at first glance. But if they are complementary, their appearance in no way guarantees that they cover all of the cat’s nutritional needs.
If wet food is to represent all or a significant part of their diet, you should prioritize the label "complete feed".
A nice appearance does not guarantee a balanced diet
We naturally tend to judge food using our own criteria.
Perfectly recognizable fillets may seem of higher quality than a homogeneous mousse.
However, cats do not just need muscle meat.
Their diet must provide them with appropriate proteins and amino acids, but also fats, essential fatty acids, vitamins, minerals, and various indispensable nutrients.
A preparation composed almost exclusively of nice meat chunks can therefore be less balanced than a wet food that is visually less impressive but correctly formulated as a complete feed.
Product appearance is not a nutritional criterion.
Checking the ingredients
Once the "complete" nature of the food is verified, the list of ingredients provides additional information.
Precision is valuable.
Labels such as:
chicken,
turkey,
beef,
salmon,
chicken liver
allow for a better identification of what the recipe actually contains.
Very general categories provide less information about the exact origin of the raw materials.
This does not automatically mean a product using general designations is bad. But a detailed composition makes it easier to compare foods and becomes particularly useful when trying to identify what a cat tolerates or not.
Offal is not an ingredient to avoid
Liver, heart, and other organs can sometimes cause concern when they appear in a composition.
However, a carnivore does not naturally consume only muscle.
Certain organs possess genuine nutritional value and provide various nutrients.
A wet food containing offal is therefore not automatically of poor quality.
Here again, the precision of their nature and the overall balance of the recipe are more important than their mere presence.
Checking analytical constituents
As with dry kibble, wet foods have analytical constituents.
These generally include:
- crude protein;
- crude fat;
- crude fiber or cellulose;
- crude ash or mineral matter;
- moisture.
And this last value completely changes how the other figures should be interpreted.
Why 10% protein in wet food does not mean "low protein"
Take a wet food showing about 10% protein and kibble showing 38%.
At first glance, the kibble seems to contain nearly four times more protein.
But the two figures are not directly comparable.
A wet food can contain around 70 to 80% water, depending on its formulation, whereas kibble contains much less.
The nutrients in the wet food are therefore diluted in a much larger quantity of water.
To truly compare two foods with very different moisture levels, you must calculate on a dry matter basis.
How to compare on a dry matter basis?
The principle is quite simple.
If a food contains 80% moisture, it contains:
100 − 80 = 20% dry matter.
If it then shows 10% protein on an as-fed basis, we can relate these proteins to the dry matter:
10 ÷ 20 × 100 = 50% protein on a dry matter basis.
Our wet food with "only 10% protein" reaches about 50% protein on a dry matter basis here.
This example shows why directly comparing the 10% of a wet food with the 38% of kibble does not make much sense.
You must compare like with like.
Moisture is actually one of the great benefits of wet food
This high quantity of water is not just there to dilute the product.
It contributes directly to the cat’s daily hydration.
Cats are not always great drinkers, and part of their water intake can come directly from their food.
A wet food containing 75 or 80% moisture therefore provides water at every meal.
This can be particularly beneficial for cats that do not drink much.
However, this does not mean that wet food replaces access to water: fresh water must always remain available.
Does more meat necessarily mean better wet food?
Not necessarily.
A high proportion of animal ingredients can be beneficial, but the displayed percentage is still not enough.
In particular, you need to know:
- which animal ingredients are used;
- how they are labeled;
- if the food is a complete feed;
- what its nutritional profile is;
- if it provides the necessary nutrients for the cat.
A can labeled "90% chicken" is not automatically preferable to a formula containing less chicken if the first is a complementary feed and the second is a properly balanced complete feed.
The percentage of meat should never make you forget the rest of the formulation.
What about vegetable proteins?
A wet food can contain certain vegetable ingredients without that being enough to condemn it.
Cats remain strict carnivores, and their specific needs must obviously be met.
But analyzing a food does not consist of just counting the number of vegetable ingredients.
What matters is the final nutritional profile of the recipe and its ability to cover the cat’s needs.
The presence of a vegetable ingredient does not automatically turn a wet food into a bad food.
Should you choose a grain-free wet food?
Not necessarily.
As with kibble, the "grain-free" label is a characteristic of the recipe, not a quality certificate.
A grain-free wet food can be excellent, average, or uninteresting.
A wet food containing a small amount of grains can also be correctly formulated.
The "complete" nature of the food, its nutritional balance, and its tolerability for the cat are much more important than a simple "grain-free" logo.
Gravy, jelly, mousse, or pâté: which to choose?
Texture mainly influences the cat’s acceptance of the product.
Some cats prefer to lick gravy, others enjoy mousses, while some only eat chunks.
There is no universally superior texture.
On the other hand, you should be attentive to a fairly common behavior: the cat that licks all the gravy and systematically leaves the chunks behind.
In this case, they are not necessarily consuming the ration as it was formulated.
A texture they eat entirely may therefore be more appropriate than a theoretically perfect recipe of which they leave half in the bowl.
The best wet food must also be eaten
You can spend a lot of time comparing labels and end up choosing a formula that seems ideal.
But if the cat refuses to eat it, it will do them no good.
Palatability therefore also counts.
This does not mean you should immediately give in to every preference and change products every two days. But the cat’s individual habits and preferences must be taken into account.
For a particularly picky cat, changes must be gradual.
Wet food and kibble can be combined
It is not mandatory to choose exclusively one or the other.
A mixed diet can combine dry and wet food.
It notably allows you to keep certain practical advantages of kibble while increasing the share of water provided by the diet.
But there is an important rule:
do not give a full ration of kibble and a full ration of wet food in the same day.
Both provide calories.
You must therefore divide the daily ration between the different foods to avoid exceeding the cat’s energy needs.
Watch the quantities
Because it contains a lot of water, wet food is generally distributed in larger gram quantities than kibble.
This can be surprising.
A cat might need several hundred grams of a wet food while their kibble ration is only a few dozen grams.
This is no reason to directly compare weights.
What matters is the energy actually provided by the ration.
The manufacturer's recommendations are a starting point that must then be adapted to the weight, activity level, and body condition of the cat.
Storage: wet food is not kibble
Once opened, wet food is much more perishable than dry food.
Unused portions must be stored in the refrigerator according to the manufacturer’s instructions and consumed within the recommended timeframe.
A wet food left in a bowl for a long time, especially when it is hot, should not remain available indefinitely.
Bowls should also be cleaned regularly.
If your cat prefers their food less cold, a portion kept in the refrigerator can be brought to a more pleasant temperature before the meal, without letting it sit out for hours.
How do you know if the wet food suits them?
A good composition on paper remains only part of the evaluation.
Observe your cat as well.
Is their weight still appropriate?
Do they eat their ration willingly?
Do their stools remain normal?
Is their digestion good?
Are their general condition and coat satisfactory?
A wet food can be perfectly balanced and not suit a particular individual.
Conversely, the tolerance of a food is not enough to prove that it is nutritionally complete.
You must therefore combine label reading with animal observation.
When a veterinary diet is necessary
For certain illnesses—notably urinary, renal, digestive, or metabolic—choosing a wet food simply because it appears to have an excellent composition is not enough.
Therapeutic foods can be formulated with precise nutritional characteristics that are not visible just by looking at the amount of meat or the protein level.
In these situations, diet is part of the cat’s treatment and must be chosen with the veterinarian.
To remember
To choose a wet food, start by forgetting the appetizing photo on the package for a few seconds.
First verify:
that it is a complete feed if it is to make up all or a significant part of the ration;
the precision of the ingredients and animal sources;
the analytical constituents;
the moisture content;
the energy density and recommended quantities;
the tolerability and palatability for your cat.
And never directly compare the protein level of a wet food with that of kibble without taking into account their difference in moisture.
A good wet food is therefore not necessarily the one that looks most like a chicken fillet on our plate.
It is above all a food adapted to the cat, nutritionally balanced, correctly distributed, and which they agree to eat.