How to actually read a dog food label

The front exists to sell: a glistening hero shot of meat and vegetables, words like “premium”, “natural” and “holistic”, and a breed or life-stage badge. None of that is closely regulated, and a photo of a chicken breast tells you nothing about how much chicken is in the recipe.

The information that is controlled sits on the back or side, in small print under headings such as Composition, Analytical Constituents, Additives and Feeding Guide. Train yourself to flip the bag first and treat the front as a billboard you can safely ignore.

The Composition, which is the ingredients list, must run in descending order by weight, measured at the point the recipe is mixed. The first two or three ingredients make up the bulk of the food, so that’s where your attention belongs. Two things distort the order.

First, water. Fresh meat is roughly 70 to 75% water, so a recipe can list “fresh chicken” first and still contain less actual chicken than a food that lists a dried “chicken meal” lower down. Once the water cooks off, that fresh chicken shrinks dramatically. Second, ingredient splitting: a maker can divide one ingredient into several entries, such as rice, rice flour and rice bran, so each appears further down the list while meat floats to the top. Add those rice fractions back together and the grain may well outweigh the meat, which is worth knowing before you decide whether grain matters for your dog. Read the whole list, not just the first word.

Composition can be written two ways: by specific ingredient (“chicken”, “salmon”, “brown rice”) or by category (“meat and animal derivatives”, “cereals”, “derivatives of vegetable origin”, “various sugars”). Category terms are legal, but they’re vague by design. “Meat and animal derivatives” can cover a changing mix of animal parts from more than one species, and the recipe may vary batch to batch.

A named ingredient with a percentage (“chicken 26%”) is the gold standard for transparency. Look, too, at whether that percentage refers to fresh or dried meat, and be wary of an open-ended phrase like “with vegetables” that never says which, or how much. For the longer version of that, the meat figure on the front is rarely the number it looks like.

The Analytical Constituents box (sometimes “typical analysis”) lists the nutrient percentages: crude protein, crude fat, crude fibre, crude ash and moisture. “Crude” just means measured in the lab, not low quality. “Crude ash”, also called inorganic matter, is the mineral content rather than literal ash, and a figure under about 8% on a dry basis is reasonable.

The catch is moisture. Wet food is around 75 to 80% water while dry food is around 8%, so you cannot compare their protein figures directly. To compare like with like, convert to dry matter: divide the nutrient by (100 minus moisture) and multiply by 100. A wet food showing 10% protein at 80% moisture is actually 50% protein on a dry-matter basis, far higher than the as-fed figure suggests. Always strip out the water before judging. If it is the formats themselves you are weighing up, our guide to dry, wet or raw does that for you.

Below the analysis sits the Additives panel, and it deserves a glance. Additives fall into groups. Nutritional additives are the added vitamins and trace elements, such as vitamin D3, vitamin E, zinc and copper. Technological additives include the preservatives and antioxidants that stop fats turning rancid. Sensory additives cover colourants and flavourings.

The thing to watch is how they’re declared. A label may simply say “EC permitted additives” or “with antioxidants” without naming them. Preservatives are the usual case where this matters. Look for named, naturally sourced antioxidants such as tocopherols (vitamin E) or rosemary extract, rather than undeclared ones. Colourings add nothing nutritionally; they’re there for the human buyer, not the dog.