Quick answer: start with the words complete or complementary, check the species and life stage, then read the feeding directions, composition and analytical constituents together. No single ingredient or headline number tells you whether a food is appropriate for an individual dog.
Last evidence check: 11 September 2026. Written by Super Dog Diets. This article provides general information and is not veterinary advice.
The five-minute label check
- Product type: complete or complementary?
- Intended animal: is it clearly labelled for dogs?
- Life stage: puppy/growth, adult or another stated stage?
- Directions: what daily amount and preparation does the maker specify?
- Contact details: can you ask the manufacturer for information that is not clear on the pack?
Complete and complementary are not marketing slogans
In UK feed law, complete feed is defined as sufficient for a daily ration because of its composition. Complementary feed is sufficient only when combined with other feed. In practical terms, a complete dog food is intended to supply the daily diet when fed as directed, while a complementary product—often a treat, mixer or topper—must not silently become the whole diet.
Check the exact wording rather than relying on packaging such as “natural”, “premium” or “with chicken”. If a product is complementary, follow its directions and account for it alongside the rest of the ration.
Check species, life stage and directions
A label should identify the animal for which the food is intended and provide directions for proper use. Confirm that the stated life stage matches your dog. Growth, adult maintenance and other nutritional situations are not interchangeable.
Feeding tables are starting points, not guarantees. Energy needs vary with body size, age, activity, neuter status, environment, health and the energy density of the particular food. Weigh food in grams where possible, monitor weight and body condition, and adjust with veterinary guidance when needed.
Composition: what is in the recipe?
The composition list identifies the ingredients or legally permitted ingredient categories used to make the food, generally in descending order by weight at the time they were added. It is useful, but it does not by itself measure ingredient quality, digestibility or the nutritional performance of the finished diet.
Named-ingredient percentages can also be misunderstood. A declaration such as “with chicken” relates to labelling rules and the amount of the named ingredient; it does not necessarily mean that chicken is the only animal-derived ingredient. Contact the manufacturer if an ingredient description matters because of a diagnosed adverse reaction.
Analytical constituents: what was measured?
UK pet-food labels normally declare crude protein, crude oils and fats, crude fibre and crude ash; moisture must be declared in circumstances set by the rules, including when it exceeds the relevant threshold. “Crude ash” does not mean ash was added. It is a laboratory term for the mineral residue left after a sample is incinerated.
Percentages from foods with very different moisture levels should not be compared casually. Wet food contains much more water than dry food, so figures printed “as fed” are not directly equivalent. A fair comparison may require dry-matter or calorie-based calculations and the product’s energy value.
Additives and nutritional information
Additives can include nutritional additives such as vitamins and trace elements, as well as technological or sensory additives. Their presence is not automatically evidence that a food is poor quality. The useful question is whether the complete formulation is appropriate, controlled and supported by the manufacturer’s quality and nutrition processes.
Questions worth asking the manufacturer
- Who formulates the food, and what are their relevant qualifications?
- How is the finished product tested for nutritional adequacy and safety?
- What is the metabolisable energy per 100 g or per serving?
- Can the company provide a typical nutrient analysis, not only minimum and maximum label guarantees?
- How are ingredient and formulation changes communicated?
These questions add context that cannot be captured by choosing one fashionable ingredient or avoiding one unfamiliar term.
When to ask your vet
Ask your veterinarian before changing food for a puppy with growth concerns, a pregnant or nursing dog, a dog with illness, persistent digestive signs, suspected allergy, unintended weight change or a prescribed therapeutic diet. A label guide cannot diagnose a problem or replace an individual nutritional assessment.
