This is the most practical article in the 4 Cats section of Wise Intake — a complete, step-by-step walkthrough of how I read a cat food label from a food quality professional’s perspective. Keep it bookmarked. Use it next time you’re standing in the pet food aisle. Everything else in this section is a deep-dive on one specific topic; this is the framework that holds all of it together.

Step 1: Ignore the front of the package entirely

Start at the back or side. The front of a pet food package is designed by a marketing department with a single objective: getting you to pick it up. “Premium,” “natural,” “gourmet,” “grain-free,” “high-protein,” images of fresh chicken or wild salmon — none of these have regulatory definitions binding them to the ingredient list. The back is where the actual information lives.

Step 2: Find the “complete” or “complementary” declaration

Somewhere on the pack — often near the feeding guide — will be a declaration that this food is “complete” or “complementary.” Complete food meets minimum nutritional requirements for all essential nutrients and can be fed as the sole diet. Complementary food is intended as a supplement to other food and shouldn’t be the only thing your cat eats. This distinction matters enormously and is easy to miss when buying.

Step 3: Read the ingredient list in order

Ingredients are listed in descending order by weight before processing. The first ingredient dominates. Here’s what to check:

Is the first ingredient a named animal protein with a percentage? “Chicken (48%)” is what you want. “Meat and animal derivatives” is what you want to question — it’s a legal catch-all category that can include variable materials and changes batch to batch. Species-specific, quantified protein is the sign of a product the manufacturer is willing to be held to.

How far down the list before you see carbohydrates? In wet food, carbohydrates are typically minimal and may not appear until very low on the list (rice or starch as a minor thickener). In dry food, you’re assessing how much of the diet is grain or starch-derived. Grain split-listing — corn, corn meal, corn gluten, appearing as separate entries — is a flag that the combined grain content may be higher than any single entry suggests.

What follows the named proteins? Broth, liver, egg — good additions. “Meat by-products” without specification — less clear. Long lists of carbohydrate sources in a food marketed as high-protein — a signal worth noting.

Step 4: Check the analytical constituents

EU-regulated pet food must declare crude protein, crude fat, crude fibre, and moisture percentages. For wet food, compare on a dry matter basis (remove the moisture from the equation) to get a true sense of protein content. A wet food showing 10% protein with 78% moisture has 45% protein on a dry matter basis — often higher than a dry food showing 30% protein at 10% moisture (which is 33% dry matter protein).

Carbohydrate isn’t required to be declared, but you can calculate it: 100% minus protein% minus fat% minus moisture% minus ash% (if declared) gives a rough carbohydrate estimate. Under 10% on a dry matter basis is genuinely low-carb for a cat food; over 30% is high.

Step 5: Check the additives section — specifically for taurine

The additives section lists supplements added to the food. Taurine must be here — either as a disclosed additive with mg/kg content, or within the ingredient list from whole-food sources. Its explicit presence confirms the product has addressed the most critical nutritional requirement specific to cats. See the taurine article for the full explanation of why this matters.

Also look for: artificial colours (which serve the owner’s perception, not the cat’s need), artificial preservatives like BHA and BHT (covered in the worst ingredients article), and whether vitamins are listed as synthetic additions (normal and necessary) or only from whole-food sources.

Step 6: Compare the front to the back

Now go back to the front. Does what the label says match what the ingredient list shows? If it says “rich in chicken” — is chicken first with a meaningful percentage? If it says “grain-free” — what carbohydrate source replaced the grain, and at what apparent volume? If it says “high-protein” — what does the analytical constituent show?

The front makes claims. The back shows the reality. The gap between them, where it exists, tells you something about the brand’s priorities.