The Legal Requirements
Dog food sold in the UK must comply with the Animal Feed Regulations 2010. Every complete dog food must carry: ingredients in descending order by weight before processing, analytical constituents, a feeding guide, and a statement of whether the food is complete or complementary.
How the Ingredients List Works
Ingredients are listed by weight before processing. This matters for meat-based ingredients, which contain a high proportion of water.
Fresh chicken is approximately 70% water by weight. After cooking, the actual protein contribution is much lower than the raw percentage suggests. This is why you cannot simply compare percentages between a fresh food and a dry food -- moisture content changes the calculation entirely.
Named vs Unnamed Ingredients
Named meat sources: "Chicken," "salmon," "lamb," "beef." You know exactly what protein you are feeding. Higher quality, more consistent.
Unnamed sources: "Meat and animal derivatives," "animal by-products," "poultry." Legal, but the composition can change batch to batch based on what is cheapest or most available.
Key Ingredients to Look For
Named meat first. Named oils (salmon oil, sunflower oil). Whole vegetables and fruits. Egg (a highly digestible protein source).
Ingredients to Be Cautious Of
Cereals or derivatives of vegetable origin in the top three ingredients. Artificial colours (E102, E110, E122, E123, E124, E129). Synthetic preservatives BHA and BHT -- natural alternatives such as mixed tocopherols are preferable. Added sugar, glucose syrup, or molasses.
The Analytical Constituents Panel
| Nutrient | Typical range (adult dry food) |
|---|---|
| Crude protein | 18 to 35% |
| Crude fat | 8 to 20% |
| Crude fibre | 1 to 5% |
| Moisture | 6 to 12% (dry) / 70 to 85% (wet) |
Complete vs Complementary
Complete: Contains all nutrients a dog needs in correct proportions. Can be fed as the sole diet.
Complementary: Designed to be fed alongside another food. Not nutritionally balanced on its own. Check every product -- a premium-looking wet food can still be complementary.
FEDIAF Nutritional Guidelines
Reputable UK manufacturers formulate to FEDIAF (Federation of European Companion Animal Food Industries) nutritional guidelines -- the primary standard for pet food in Europe, updated in 2024. If a food is labelled complete, it should meet these standards. See: fediaf.org