How to Read a Dog Food Label - and Spot the Tricks Brands Use

At a glance

• Ingredients are listed by weight before cooking, which means a protein listed first can still make up a small proportion of the finished food once moisture is removed during processing
• Ingredient splitting is one of the most common labelling tricks - breaking one ingredient like wheat into multiple forms (wheat flour, wheat gluten, wheat bran) so each appears lower on the list individually
• "Meat and animal derivatives" is a legal catch-all term that can include almost any part of almost any animal - it tells you very little about what is actually in the food
• A short ingredient list where every item is recognisable is a more reliable quality signal than any front-of-pack claim
• "Complete" has a specific legal meaning - the food meets minimum nutritional requirements for the life stage stated on the pack - and is a meaningful claim worth looking for

Why is a dog food label so hard to read?

The reliable information on a dog food label is the ingredient list, the declared percentages and the analytical constituents, all of which sit on the back of the pack. Everything on the front is presentation, and UK labelling rules leave significant room for presentation choices that obscure more than they reveal. A label can be entirely legal and still be genuinely misleading about the quality of what is inside.

Some of this is passive: the conventions of ingredient listing, serving suggestion photography, and front-of-pack design are all tilted in the manufacturer's favour. Some of it is more deliberate: specific techniques like ingredient splitting and strategic use of umbrella terms are widely used across the industry to make a product look better than a straightforward reading of its contents would suggest.

None of this requires fraud. It operates entirely within the rules. Understanding how the rules work is what gives you the ability to read past the presentation and assess what you are actually buying.

How does the ingredient list actually work?

Ingredients are listed in descending order by weight at the time they are added during manufacturing - not by weight in the finished product. This distinction matters more than most people realise, because many ingredients change significantly in weight during cooking.

Fresh chicken, for example, is roughly 70% water. When listed as the first ingredient, it is the heaviest item going into the mix - but once that moisture is driven off during high-temperature processing, the actual chicken content in the finished food drops considerably. A dry food listing "fresh chicken" first, followed by several grain ingredients, can contain more grain than chicken by the time it reaches the bowl.

This is not illegal. It is how ingredient listing rules work for all pet food. But it means a protein appearing at the top of an ingredient list is not the same as that protein being the dominant ingredient in the food you are feeding. The percentage of a named ingredient, where declared, is the more reliable figure - look for it in brackets next to the ingredient name. Marleybones declares a percentage for nearly every ingredient in each recipe, which is the difference between a label you can verify and one you have to take on trust.

What is ingredient splitting and why does it matter?

Ingredient splitting is the practice of listing a single ingredient under multiple sub-forms so that each individual entry appears lower on the list than it would if they were combined. It is one of the most widely used techniques for making an ingredient look less prominent than it actually is.

The most common application is with grains and cereals. Instead of listing "wheat" as a single entry - which would push it to the top of the list - a manufacturer can list "wheat flour", "wheat gluten", and "wheat bran" as three separate ingredients. Each individual entry sits lower down the list, giving the impression that wheat is a minor component. Added together, wheat can be the largest single ingredient in the food.

The same technique is used with other ingredients: rice can become "rice", "rice flour", and "rice bran"; maize can appear as "maize", "maize gluten", and "maize starch". If you spot two or three variations of the same base ingredient on a label, add them together mentally and consider where that combined ingredient would sit on the list. That is the more accurate picture.

What does "meat and animal derivatives" actually mean?

"Meat and animal derivatives" is a legal umbrella term that can include any part of any warm-blooded animal not condemned as unfit for human consumption. In practice it covers offcuts, organs, bone, connective tissue, and other processing by-products from a range of species. The specific content varies between batches depending on what is available and cost-effective at the time of manufacturing.

This matters for two reasons. First, if your dog has a protein sensitivity or allergy, "meat and animal derivatives" gives you no reliable information about which proteins are actually in the food, making it impossible to manage their diet accurately. Second, the nutritional quality of derivatives varies significantly - some are nutritionally valuable, others add little beyond bulk.

Named meat sources - "chicken breast", "deboned lamb", "salmon fillet" - are a meaningfully different declaration. They tell you what species, and in some cases what cut, the protein is sourced from. A food built around named proteins with percentages declared is giving you actual information. The difference between how fresh meat and processed meat ingredients are declared on a label is worth understanding before drawing conclusions from any single ingredient entry. "Meat and animal derivatives (min. 4% chicken)" tells you very little beyond the legal minimum.

What are the other common labelling tricks worth knowing?

The five conventions worth knowing are the 4% "with" rule, flavour declarations that require no actual ingredient, moisture comparisons that make dry food look higher in protein, unregulated front-of-pack terms, and hero ingredients highlighted without a declared percentage.

The "with chicken" rule

Under UK and EU pet food labelling rules, a product only needs to contain 4% of an ingredient to use "with" in the name - as in "with chicken" or "with salmon." A product that says "with real salmon" on the front can contain 4% salmon alongside a long list of cheaper proteins and derivatives. The threshold for using an ingredient name without "with" is 26%. If the front of pack says "chicken recipe" or "salmon dinner" rather than "with chicken" or "with salmon," the threshold is higher - but still not a guarantee of a high-meat product.

Flavour declarations

A product described as "beef flavour" is not required to contain any beef at all. Flavourings can be used to create the taste and aroma associated with a protein without that protein being present as an ingredient. This is relevant for dogs with sensitivities: a food labelled "beef flavour" can still contain other proteins not prominently declared.

Misleading moisture comparisons

Dry food and wet food cannot be directly compared on protein or fat percentages without adjusting for moisture content. A wet food showing 8% protein contains significantly more protein on a dry matter basis than that figure suggests, because 80% of the food is water. A dry food showing 25% protein and a wet food showing 8% protein deliver comparable protein levels per serving once moisture is accounted for. Brands rarely make this calculation easy for you.

Front-of-pack health claims

Terms like "natural", "wholesome", "premium", and "artisan" have no legal definition in pet food labelling and carry no regulatory weight. They are marketing language. "Complete and balanced", "FEDIAF compliant", and specific analytical constituent declarations are regulated claims with defined meanings - these are the ones worth paying attention to.

Ingredient highlighting without percentages

A brand might feature a hero ingredient prominently in photography and copy - say, "packed with superfoods" - without declaring what percentage of the food that ingredient represents. Highlighting an ingredient that is present in trace quantities is entirely legal. Where an ingredient is genuinely significant, the percentage is declared because it supports the claim. Where it is not declared, that is informative in itself.

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What does a good ingredient list actually look like?

A short list where every ingredient is something you can picture in its natural form is the most reliable indicator of a quality food. Not because short lists are inherently nutritionally superior, but because they leave less room to hide lower-quality inputs behind legitimate-sounding categories.

Named proteins with percentages declared, whole vegetables listed individually, and any added supplements named specifically - these are the characteristics of a label that is giving you genuine information. Marleybones, for example, lists every ingredient by name with no derivatives, no unnamed proteins, and no artificial preservatives - because the recipe is built around a small number of whole ingredients that do not need to be obscured.

The absence of artificial preservatives is worth checking separately. BHA, BHT, ethoxyquin, and sodium metabisulphite are the most common synthetic preservatives in commercial dog food. They are not present in fresh or gently cooked food by design. In dry and some wet foods, they extend shelf life but are associated with digestive sensitivity in reactive dogs. What "no artificial preservatives" actually means in practice is worth understanding, because the claim applies to the full recipe and not just the meat component.

What do the analytical constituents tell you?

UK pet food law requires a declaration of four analytical constituents: crude protein, crude fat, crude fibre, and moisture. These figures appear in a box, usually on the back or side of the pack, and are the most standardised data point available for comparing foods.

Crude protein is the most referenced figure, but it has a significant limitation: it measures total nitrogen content and cannot distinguish between high-quality animal protein and lower-quality protein sources like hydrolysed feathers, which are technically protein but nutritionally poor. A high crude protein percentage is a necessary but not sufficient indicator of protein quality.

Moisture content is particularly useful. Dry kibble sits at around 10% moisture, fresh and wet food at 65-85%, and Marleybones meals at 72%. This affects not just digestibility but how the analytical constituent percentages should be read - a wet food with 8% crude protein and 78% moisture contains more protein per gram of dry matter than the headline figure suggests. If you are comparing two foods on protein content, the differences between fresh food and dry kibble become clearer once both are converted to a dry matter basis for an accurate comparison.

Once you can read a label properly, the harder question is which of the foods that pass that test actually suits your own dog's age, size and health requirements.

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FAQs

What does "complete" mean on a dog food label?

"Complete" is a regulated term meaning the food meets the minimum nutritional requirements for dogs at the life stage stated on the pack, as defined by FEDIAF guidelines, and can be fed as the sole diet without supplementation. "Complementary" foods, including many treats and mixer biscuits, do not meet these requirements and need to be fed alongside a complete food.

Is "natural" dog food actually better?

"Natural" has no legal definition in UK pet food labelling and can be applied to almost any product. A food marketed as natural can still contain derivatives, artificial preservatives, and heavily processed ingredients. The ingredient list and analytical constituents are the reliable data points.

How do I know how much meat is actually in a dog food?

Look for a percentage in brackets next to the named meat ingredient, for example "chicken (65%)" or "deboned salmon (55%)". Where no percentage is declared for the primary protein, the brand is not required to tell you, and position on the list alone cannot tell you the actual proportion. Marleybones declares 60% named meat or fish in all four recipes, which is the kind of figure worth looking for on any pack.

What is the difference between "chicken" and "chicken meal" on an ingredient list?

"Chicken" refers to fresh or frozen chicken added before cooking, which includes its natural moisture content. "Chicken meal" has already been rendered and dried before being added, giving it a higher protein concentration by weight but involving higher processing temperatures. Neither is inherently good or bad, but they are meaningfully different ingredients.

Should I be worried if I see "derivatives" on the label?

For healthy dogs without known sensitivities, derivatives are not automatically a concern, and some are nutritionally valuable. For dogs with protein sensitivities or allergies the vagueness is a practical problem, because you cannot manage a sensitivity without knowing which proteins are in the food. For those dogs, named protein sources with declared percentages are meaningfully better.

Are preservatives in dog food harmful?

Artificial preservatives like BHA and BHT are approved for use in pet food at regulated levels and are not acutely harmful at the quantities typically found in commercial food. They are among the additives most commonly associated with digestive sensitivity in reactive dogs. Fresh and gently cooked foods do not require them, because the cooking and packaging process preserves the food without them.

What is the most important thing to look for on a dog food label?

The ingredient list, read in full, is more informative than any front-of-pack claim. Look for named protein sources with percentages declared, a short list with no umbrella terms like "meat and animal derivatives", and no artificial preservatives. The back of the pack is where the useful information lives.

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