How to Read a Dog Food Label (UK) — A Plain-English Guide
A UK dog food label is a small masterpiece of legally-permitted vagueness. Brands are allowed to say "with chicken" when the food is mostly something else, to group mystery ingredients under one tidy phrase, and to splash unregulated words like "premium" and "natural" across the front of the bag.
None of that is illegal — it's how pet food labelling law works. But once you understand the rules, the same label that looked reassuring starts telling you the real story. This guide walks through every part of a UK dog food label, in plain English, so you can compare two bags on the shelf and know which one is genuinely better value for your dog.
The Two Halves of Every Label
Almost everything that matters legally sits in two places on the pack, usually on the back or side:
- The Composition — the ingredient list, in descending order by weight.
- The Analytical Constituents — the guaranteed nutrient percentages (protein, fat, fibre, ash, moisture).
The big, friendly claims on the front — "rich in real chicken", "grain-free goodness", "vet recommended" — are marketing. They're governed by some rules (see the 4% rule below) but they're designed to sell, not to inform. Train your eye to skip straight to the composition and constituents.
Reading the Composition (Ingredient List)
Ingredients are listed heaviest first
Ingredients appear in descending order by weight, so what comes first should make up the largest share. That's why people say "look for meat first" — and it's good advice, with one important catch explained below.
The "fresh meat" water trick
This is the single most misunderstood thing on a dog food label. "Fresh" or "freshly prepared" chicken is weighed before cooking, when it's roughly 70% water. During processing that water cooks off, so the actual contribution of chicken to the finished kibble is far smaller than its top-of-list position suggests.
A "dried meat meal" or "dehydrated chicken", by contrast, is already weighed in its low-moisture form. So a food listing "dried chicken (30%)" can contain more real chicken than one listing "fresh chicken" first with no percentage given. Don't reward a food just for putting fresh meat at the top — check the percentage.
"Meat and animal derivatives" and other category terms
UK and EU law lets manufacturers group ingredients under category names instead of naming them. The ones to recognise:
- Meat and animal derivatives — any animal parts, any species, in any proportion. Can include decent offal; can include low-value material. You can't tell, and you can't avoid a specific protein.
- Cereals — any grain, unnamed. Could be rice (good) or low-grade wheat fractions (less so).
- Derivatives of vegetable origin — plant by-products from other food manufacturing.
- EC permitted additives — a catch-all that can hide artificial colours, preservatives and flavourings.
Category terms aren't proof of poor quality, but they remove your ability to judge or compare. A brand naming "freshly prepared salmon (40%), sweet potato, peas" is being transparent; one listing "meat and animal derivatives (min 4%), cereals, derivatives of vegetable origin" is choosing not to be. For any dog on an elimination diet, named single proteins aren't optional — vague category terms make the trial impossible.
Split ingredients
A subtler trick: a single ingredient (say, grain) can be broken into several sub-types — "maize, maize gluten, maize bran" — so each appears lower down than meat. Added together they might outweigh the meat. If you see the same base ingredient listed three or four times in different forms, mentally recombine them.
The 4% Rule and Flavour Claims
Front-of-pack flavour wording is governed by minimum percentages, and they're lower than most owners assume:
| Wording on pack | Roughly what it guarantees |
|---|---|
| "With chicken" / "with beef" | As little as 4% of that ingredient |
| "Rich in chicken" | A higher minimum (commonly around 14%+) |
| "Chicken dinner / chicken recipe" | A meaningful named proportion, but still check the figure |
| "100% chicken" (treats) | Only that ingredient — common on single-protein treats |
The takeaway: "with salmon" tells you almost nothing about how much salmon is in the bowl. The composition percentage is the truth; the front-of-pack flavour claim is the headline.
Reading the Analytical Constituents
These are the guaranteed nutrient levels. For a typical adult dry food you'll see something like:
- Crude protein — often 20–30% in dry food. Higher isn't automatically better; the source matters (named meat beats plant protein from peas and potato for bioavailability).
- Crude fat / oils — usually 10–18%. Working and active dogs need more; weight-prone dogs need less.
- Crude fibre — typically 2–5%. Helps stool quality and satiety.
- Crude ash (inorganic matter) — the mineral content left if the food were burned. Under ~8–10% is normal; consistently high ash can flag bony or low-grade ingredients.
- Moisture — about 8–10% in dry food, 75–82% in wet food. This number is the key to fair comparisons.
Why you can't compare wet and dry food directly
Because wet food is mostly water, its raw protein figure looks tiny next to dry food — but that's an illusion. To compare fairly, convert to a dry matter basis:
- Subtract the moisture % from 100 to get the dry matter %.
- Divide the nutrient % by the dry matter %, then multiply by 100.
Example: a wet food shows 10% protein and 80% moisture. Dry matter is 20%. So 10 ÷ 20 × 100 = 50% protein on a dry matter basis — actually very high, despite the small label number. Do this before concluding a wet food is "low protein".
"Complete" vs "Complementary"
This single word decides whether a food is safe as your dog's main diet:
- Complete — formulated to provide every nutrient your dog needs, to FEDIAF standards, as the sole diet.
- Complementary — not nutritionally complete; meant to be fed alongside other food. Many treats, meat toppers and some premium wet foods are complementary.
Feeding a complementary food as a complete diet long-term can cause nutritional deficiencies. Always confirm "complete" before something becomes the daily meal.
The Words That Mean Nothing
Several reassuring terms have no legal definition in UK pet food and shouldn't sway your decision on their own:
- Premium / super-premium — marketing only.
- Natural / holistic — largely unregulated.
- Human-grade — no enforceable UK pet-food meaning.
- Hypoallergenic — does not guarantee your dog won't react; a genuinely novel single protein matters far more.
Judge a food on named ingredients, stated percentages, the analytical constituents and the "complete" claim — not on adjectives.
A 60-Second Label Checklist
- Is a named meat first, with a percentage? (Not "meat and animal derivatives".)
- Is the meat "fresh" (water-heavy) or "dried/meal" (concentrated)? Adjust expectations.
- Are grains/legumes split into multiple entries to hide their true share?
- Does the front-of-pack claim ("with X") match a decent percentage in the composition?
- Do the analytical constituents suit your dog (protein source, fat level for activity/weight)?
- Does it say "complete" if it's the main diet?
- Ignore "premium", "natural", "hypoallergenic" — they're not doing any work.
Putting It Into Practice
Once you can read a label, the grain-free question gets much simpler — it's about ingredient quality and whether your dog actually has a sensitivity, not the word on the bag. See grain-free vs regular dog food for the cost and nutrition comparison, and is grain-free dog food actually good for the evidence behind the hype.
Label-reading also cuts through the format debate: the same skills let you compare a cold-pressed pellet, an extruded kibble and a complete raw on what's actually inside. See cold-pressed vs kibble vs raw dog food for an honest comparison of how each is made, its safety, and real cost per day.
If you're label-reading because your dog has a specific issue, our condition guides translate the science into food choices: itchy skin, sensitive stomachs, allergies and more are covered in the dog food by breed hub and across our best grain-free dog food UK picks. And if you suspect a true food allergy, read the elimination diet guide before changing anything — the label only matters once you know what you're looking for.
This guide is general information, not veterinary advice. If your dog has a diagnosed condition or you're managing a medical diet, check changes with your vet.
Frequently Asked Questions
What does 'meat and animal derivatives' mean on a UK dog food label?
It's a legally defined category term for animal parts not sold for human consumption — which can include good-quality offal but also lower-value material, and crucially it doesn't tell you which animal or how much of each. UK and EU labelling law allows this grouped wording instead of naming the species. It isn't automatically 'bad', but a brand confident in its ingredients usually names them (e.g. 'freshly prepared chicken 26%'). Vague category terms make it impossible to compare quality or to avoid a specific protein during an elimination diet.
What is the 4% rule on dog food packaging?
Under UK/EU pet food labelling rules, a flavour claim on the front of the pack only has to reflect a small amount of that ingredient. As a rough guide, 'with chicken' can mean as little as 4% chicken, while 'rich in chicken' or 'chicken dinner' style claims require more. So 'with beef' does not mean the food is mostly beef. Always check the percentage in the composition list rather than trusting the front-of-pack wording.
Should the first ingredient on a dog food label always be meat?
Ideally a named meat appears first, because ingredients are listed in descending order by weight. But there's a catch: 'fresh' meat is weighed before cooking when it's about 70% water, so once cooked it shrinks dramatically. A food listing 'fresh chicken' first may contain less actual chicken than one listing a 'dried meat meal'. Look at the stated percentage and whether meat appears more than once (sometimes split to push it down the list).
What are 'analytical constituents' on dog food and what numbers matter?
Analytical constituents are the guaranteed nutrient percentages: crude protein, crude fat (oils), crude fibre, crude ash (inorganic mineral content), and usually moisture. For a typical adult dog, dry food is often around 20–30% protein and 10–18% fat. 'Crude ash' below about 8–10% is normal; very high ash can indicate lower-quality ingredients. Remember you can't compare wet and dry food directly on these numbers because of their very different moisture levels.
What does FEDIAF complete and balanced mean?
'Complete' means the food is formulated to provide all the nutrients a dog needs as its sole diet, to the standards set by FEDIAF (the European pet food industry body). 'Complementary' means it is not nutritionally complete and is meant to be fed alongside other food — many treats, toppers and some wet foods are complementary. Always check whether a food says 'complete' before using it as your dog's main diet.
How do I compare wet and dry dog food fairly?
Convert both to a 'dry matter' basis, because wet food is roughly 75–82% water and dry food only about 8–10%. To do this, subtract the moisture percentage from 100 to get the dry matter, then divide the nutrient by that figure and multiply by 100. For example, 10% protein in a wet food with 80% moisture is 10 ÷ 20 × 100 = 50% protein on a dry matter basis — far higher than the raw label suggests.
Are 'natural' and 'premium' regulated terms on dog food in the UK?
Largely no. 'Premium', 'natural', 'holistic' and 'human-grade' are marketing words with no strict legal definition for pet food in the UK, so they tell you very little on their own. 'Hypoallergenic' is also unregulated and does not guarantee your dog won't react. Judge the food on its named ingredients, stated percentages and the 'complete' claim, not on these adjectives.