01What the Ingredients List Is Actually Telling You
Pet-food labels follow rules set by regulators — in the US, that's a patchwork of the FDA and individual state standards, with the Association of American Feed Control Officials (AAFCO) providing the model guidelines most manufacturers follow. In the UK, the framework comes from retained EU feed law. Either way, the ingredients list works the same way everywhere: items are listed in descending order by weight before cooking. That single fact does a lot of work.
It means a food listing "chicken, chicken meal, peas" has more fresh chicken by weight than anything else — but fresh chicken is roughly 70% water. Once cooked down, it may contribute less actual protein than the chicken meal lower on the list. Chicken meal is simply chicken with the water already removed, which makes it a concentrated protein source. Neither is a dirty trick; knowing the difference just helps you compare bags honestly.
What you're really scanning for is whether a named protein — chicken, salmon, lamb, beef — appears in the first couple of positions, and whether the carbohydrate fillers (corn, wheat, soy, pea starch) are spread across several entries to push them down the list or clustered near the top. A long chain of different starches all appearing together is worth noting: individually they rank lower, but collectively they may dominate the food.
Preservatives are worth a glance too. Mixed tocopherols (a form of vitamin E) and rosemary extract are naturally derived. Ethoxyquin, BHA, and BHT are synthetic; the science on long-term effects in pets is genuinely unsettled, so if you'd rather avoid them, you can. That's a preference, not a verdict.
02The Guaranteed Analysis and the "Complete and Balanced" Claim
Flip to the guaranteed analysis panel. You'll see minimum percentages for crude protein and crude fat, and maximum percentages for crude fibre and moisture. Note those words — crude and minimum/maximum. These are regulatory floors and ceilings, not precise measurements of what's in every batch. A food showing 26% minimum crude protein might actually run a little higher; you won't know the exact figure from the label alone.
Moisture percentage matters more than most people realise. Dry kibble typically sits around 10% moisture; wet food is often 75–80%. This makes direct comparisons between the two genuinely misleading if you just read the numbers off each label. To compare them fairly, you need to convert both to a dry-matter basis — strip out the moisture, then look at what's left. The arithmetic is simple: if a wet food shows 8% protein and 78% moisture, divide 8 by 22 (the dry matter) and multiply by 100. That gives you roughly 36% protein on a dry-matter basis, which tells a very different story than 8% does.
Now, the phrase "complete and balanced" — it sounds like marketing, but it actually carries regulatory weight. In the US, a food can only make that claim if it either meets AAFCO's published nutrient profiles for a given life stage, or has passed AAFCO feeding trials. Both paths have limits (nutrient profiles don't test long-term palatability; feeding trials are relatively short), but the claim is still meaningful. A food without it is best used as a topper or treat, not a sole diet. Look also for the life-stage statement alongside it: "adult maintenance," "growth" (for puppies and kittens), or "all life stages." All-life-stages foods meet the higher nutritional bar set for growing animals, so they work for adults too — the reverse is not true.
03A Quick Label Habit Worth Building
You don't need to audit every bag obsessively. A thirty-second check covers the essentials: named protein at the top of the ingredients list, the complete-and-balanced claim present, and a life-stage statement that matches your animal. After that, watch your pet — coat condition, energy, stool quality, and a waistline you can feel are better long-term guides than any panel on the packaging.
The marketing side — "premium," "natural," "ancestral recipe" — carries no regulatory definition in most jurisdictions. It means whatever the brand wants it to mean. The back of the bag is where you find what's real. That's where to look.