from the dog health hub
How Much Protein Does Your Dog Actually Need?
Protein is the most argued-about number on a dog food label, and most of the argument misses the point. The percentage on the bag matters less than two other things: whether the protein is digestible enough for your dog to use, and whether it suits your dog's life stage and health. Here is the practical version, without the marketing.
the short version
- Adult dogs need a minimum of roughly 18 percent protein on a dry matter basis; growing puppies need more, around 22 to 25 percent
- Quality and digestibility matter more than headline percentage; a lower number of excellent protein can outfeed a higher number of poor protein
- High protein does not damage healthy kidneys; that persistent myth came from old rat studies
- Senior dogs generally need more good protein, not less, to slow muscle loss
- Comparing labels fairly means converting to dry matter, because moisture skews the numbers
What Protein Actually Does
Protein supplies amino acids, the raw material for muscle, skin, coat, enzymes, hormones and immune components. Dogs need ten essential amino acids they cannot make themselves, and a protein source is "complete" when it delivers all of them in usable proportions.
This is why source quality matters so much. Two foods can both say 25 percent protein while one delivers highly digestible, complete protein and the other delivers poorly digestible protein your dog largely passes through. The bag number tells you quantity; it says nothing about how much of it your dog can actually use.
The Numbers, By Life Stage
European nutrition guidelines (FEDIAF, which UK complete foods follow) set minimums, not targets. As a practical guide, on a dry matter basis:
- Adult maintenance: around 18 percent minimum. Typical quality adult foods run 20 to 30 percent.
- Puppies and pregnant or nursing mums: around 22 to 25 percent minimum, with growth diets formulated to match.
- Active and working dogs: more than couch companions, delivered through slightly higher protein and, mostly, more calories.
- Senior dogs: this is the one people get backwards. Ageing dogs lose muscle (sarcopenia, same as us), and the evidence supports maintaining or increasing quality protein in healthy older dogs rather than cutting it. Restriction is a targeted medical strategy for specific diagnosed conditions, made with a vet, not a default for grey muzzles.
A minimum is the floor below which deficiency becomes a risk. Feeding at the floor is not the goal; feeding a well-formulated diet comfortably above it is.
The Kidney Myth, Retired
The idea that high-protein diets damage dogs' kidneys has survived decades past its evidence. It originated in old rodent research that did not translate: studies in healthy dogs have not shown protein at sensible levels causing kidney damage.
The truth underneath the myth: dogs with already diagnosed kidney disease are often moved to controlled-protein, controlled-phosphorus prescription diets, because damaged kidneys handle protein waste products poorly. That is disease management, not prevention. A healthy dog does not protect its kidneys by eating less protein, any more than you protect your knees by walking less.
Reading the Label Like You Mean It
Two tricks make label numbers honest:
Convert to dry matter. Moisture dilutes percentages. A wet food at 9 percent protein and 78 percent moisture is roughly 41 percent protein on a dry matter basis; a dry food at 26 percent protein and 10 percent moisture is about 29 percent. The wet food that looked weaker is actually the more protein-dense recipe. Divide the protein percentage by (100 minus the moisture percentage), multiply by 100.
Look at where the protein comes from. Named sources high in the ingredient list beat vague ones. "Insect protein", "chicken", "salmon" tell you something; "meat and animal derivatives" tells you the recipe may change batch to batch, which matters enormously for sensitive dogs trying to avoid a trigger ingredient.
Protein and the Sensitive Dog
Here is the part most protein guides skip: protein is not just a quantity question, it is the single most common source of food allergies in dogs. When a dog reacts to food, the trigger is almost always a protein the immune system has met many times, which in the UK means chicken and beef above all.
Two practical consequences:
- If your dog has itchy skin, recurrent ear trouble or a rumbling gut, changing the protein source matters far more than changing the protein amount. This is the logic of novel protein diets: a protein your dog has never met, like insect protein, cannot yet be a trigger.
- Consistency of source matters. Foods with loosely specified meat content make it impossible to know what your dog is actually eating from bag to bag.
For the full picture, our guides to novel proteins and the elimination diet go deep on this.
Can a Dog Get Too Much Protein?
Within the range of real commercial foods, excess protein is mostly just expensive: surplus amino acids are used for energy or excreted. The genuine cautions are specific: dogs with diagnosed kidney or liver disease need managed protein under veterinary guidance, and very high-protein feeding alongside low activity can simply mean surplus calories.
For everyone else, the practical question is not "is this too much protein" but "is this good protein, in a complete diet, at the right calories for this dog's life".
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Frequently Asked Questions
What percentage of protein should I look for in dog food?
For a healthy adult, anything from the low twenties upward on a dry matter basis from quality named sources is comfortable. Puppies should be on a growth-formulated diet. The floor is roughly 18 percent dry matter for adults; quality matters more than chasing the highest number.
Is more protein better for building muscle in active dogs?
Up to a point. Active dogs use more protein and more calories, but muscle is built by work plus adequate nutrition, not by protein percentage alone. A quality diet in the mid-to-high twenties dry matter covers most sporting dogs.
Do senior dogs need low-protein food?
Generally no. Healthy seniors benefit from maintaining good protein intake to slow muscle loss. Protein restriction is for specific diagnosed conditions, decided with your vet.
Is insect protein actually complete enough for dogs?
Black soldier fly larvae protein delivers a full amino acid profile and digestibility comparable with conventional meats, which is why it can anchor a complete diet. Its separate advantage is novelty: almost no UK dog has an immune history with it.
How do I compare a wet and a dry food's protein fairly?
Convert both to dry matter: protein divided by (100 minus moisture), times 100. Comparing bag numbers without this step flatters dry food every time.
the food behind the guide
One novel protein.
None of the usual suspects.
Some Grub is a cold-pressed, hypoallergenic dog food built around insect protein — a protein most dogs have never met, which is the whole point of a food trial.
See the food →This guide is for information, not diagnosis. Dogs with kidney, liver or other diagnosed conditions need diet decisions made with their vet.
Last updated: 2026-07-19
Author: Ben Chapman