How to read a dog or cat food label, step by step

To read a dog or cat food label, start with the nutritional adequacy statement, which tells you whether the food is complete and balanced for your pet's life stage. Then check the product name and ingredient list for what the food is mostly made of, compare the guaranteed analysis on a dry-matter basis, and use the calorie statement and feeding guide to work out portions. The front of the bag is marketing; the useful information is usually on the back and sides.

Below, each part is explained in a sensible order, using the US rules many labels follow, with notes on the UK and Europe. It applies to cat food as well as dog food.

Read the label in this order

The nutritional adequacy statement

In the US, this is the line that says the food is complete and balanced for a particular life stage. The common life stages are growth (puppies and kittens), reproduction (pregnant or nursing animals), adult maintenance, and all life stages, which means the food meets the requirements for growth as well as adulthood.

It also says how adequacy was established: formulated means the recipe was designed to meet nutrient profiles published by AAFCO, the Association of American Feed Control Officials, while feeding trials means it was fed to animals under a set protocol. Both are accepted routes, and the AAFCO website explains the framework.

If the label says intermittent or supplemental feeding only, it is a treat, topper or mixer, not a full diet.

The product name

In the US, the name itself has a meaning. Broadly:

• A name such as Chicken Dog Food means chicken makes up at least about 95% of the product, not counting water added for processing.
• Words like Dinner, Entrée, Formula or Platter, as in Chicken Dinner, mean the named ingredient is at least about 25% of the product, excluding water.
• The word with, as in Dog Food with Chicken, only requires about 3% of the named ingredient.
• Chicken Flavour means there must be a detectable flavour of chicken, which can come from a broth, digest or fat rather than meat.

So Beef Dinner for Cats and Cat Food with Beef sound similar but can contain very different amounts of beef.

The ingredient list

Ingredients are listed in descending order by weight before processing. Fresh meat is mostly water, so it can appear first while contributing less protein than a dry ingredient further down. Chicken meal has had most of its water removed, making it a concentrated protein source.

Watch for ingredient splitting, where one ingredient appears in several forms, such as peas, pea protein and pea fibre. Each sits lower on the list than the combined total would, making meat look more dominant than it is.

If your vet suspects a food allergy, perhaps because of itchy skin or constant paw licking, check every protein source, including fats, broths and digests.

The guaranteed analysis

This panel gives minimum crude protein and fat, and maximum crude fibre and moisture, sometimes with extras such as taurine in cat food. These are minimums and maximums, not exact amounts, and are given on an as-fed basis, including the water in the food.

The calorie statement

US labels state energy as kilocalories per kilogram and per cup or can. It is the most practical number for weight control, because similar-looking foods can differ a lot in energy density. When switching foods, compare calories per portion, not scoop size.

The feeding guide

Feeding guides are a starting point: neutered, older or less active pets often need less, and working dogs more. Adjust over a few weeks based on weight and body shape, which is easier if you weigh your dog or cat regularly.

How to compare wet and dry food: the dry-matter basis

Because the guaranteed analysis includes water, you cannot compare wet and dry food directly. Wet foods are often around three-quarters water, so their protein looks low on the label. To convert to a dry-matter basis, subtract the moisture percentage from 100 to get the dry matter, then divide the nutrient percentage by the dry matter and multiply by 100.

An illustrative example with round numbers, not a real product:

• Wet food: 10% protein and 78% moisture. Dry matter is 100 minus 78, which is 22%. Protein on a dry-matter basis is 10 divided by 22, which is about 45%.
• Dry food: 26% protein and 10% moisture. Dry matter is 100 minus 10, which is 90%. Protein on a dry-matter basis is 26 divided by 90, which is about 29%.

The dry food looked higher in protein on the label, but once water is removed the wet food has more. The same method works for fat and fibre, and the result is still an estimate.

Marketing words: which ones mean something

• Natural has a defined meaning under AAFCO guidance: ingredients from plant, animal or mined sources that are not chemically synthetic, though added synthetic vitamins and minerals are allowed if disclosed.
• Organic is regulated in the US under the national organic programme rules, and in the UK and EU organic claims also require certification.
• Human-grade is only meant to be used when every ingredient and the finished product are handled, made and stored to human food standards. It is not a measure of nutritional quality.
• Holistic, premium, gourmet and similar words have no regulatory definition. They tell you about positioning, not nutrition.

Grain-free diets and heart health

Grain-free foods are not automatically better or worse. The US Food and Drug Administration has investigated reports of dilated cardiomyopathy (DCM), a heart muscle disease, in dogs eating certain diets, many grain-free and high in peas, lentils or potatoes. A cause has not been established; updates appear in the FDA animal and veterinary section. If you feed or are considering a grain-free diet, discuss it with your vet.

Reading labels in the UK and Europe

In the UK and EU, labels follow local law, and FEDIAF, the European pet food industry federation, publishes widely used nutritional guidelines. Instead of complete and balanced, you will see complete feed for a full diet and complementary feed for treats and toppers.

The guaranteed analysis is called analytical constituents, ingredients may be listed by category, such as meat and animal derivatives, and the US naming thresholds do not apply. The principles are the same: check it is complete for the life stage and read past the front of the pack.

A few extra points for cat food

Cats are obligate carnivores and need nutrients such as taurine from their diet. Choose a food labelled complete for cats, never dog food as a main meal. Many cats benefit from some wet food for extra water, and the dry-matter method helps you compare options.

How Petify helps

Petify's food label scan reads the ingredient list and checks it against your pet's profile and diet plan, flagging ingredients you want to avoid. Keep foods and weights in your pet's health records to see whether a new food suits them, and ask the AI vet if you are unsure whether a reaction needs a call to your clinic.

Frequently asked questions

What does AAFCO approved mean on dog food?

AAFCO does not approve, certify or test individual pet foods. When a label mentions AAFCO, it usually means the food was formulated to meet AAFCO nutrient profiles or passed AAFCO feeding trial procedures. Check the full adequacy statement for the life stage it covers.

Is a food with meat as the first ingredient always better?

Not necessarily. Ingredients are ranked by weight before cooking, and fresh meat is mostly water, so it can top the list while contributing less protein than ingredients further down. Read the whole list alongside the guaranteed analysis.

How do I compare protein in wet and dry cat food?

Convert both to a dry-matter basis. Subtract the moisture percentage from 100, then divide the protein percentage by that number and multiply by 100. This removes the effect of water so you can compare them fairly.

What does complete and balanced mean on pet food?

It means the food contains all the nutrients a pet needs in the right proportions for the life stage stated, so it can be fed as the sole diet. Foods labelled for intermittent or supplemental feeding, or complementary in the UK and EU, are not designed to be fed alone.

Is grain-free food bad for dogs?

The FDA has investigated a possible link between some grain-free diets and DCM in dogs, but no cause has been established. Many dogs eat grain-inclusive or grain-free diets without problems. Talk to your vet about what suits your dog's breed, health and history.