We hard-failed a freeze-dried cat food. Chicken hearts were ingredient #3.

What the rule actually says

Here is the rule in plain terms. The biggest piece of a cat food’s score is its Nutrition Fit sub-score, which is 30% of the composite. It starts at 6.5 and climbs toward 10 as a food earns points for an AAFCO match, feeding-trial proof, the right band of dry-matter protein, a declared taurine level, and a stated calorie content. One rule sits above all of that and overrides it:

HARD FAIL: if taurine NOT declared and life stage is Adult or All Life Stages, FLOOR nutrition score at 4.0 regardless of other rules.

That is what fired on Vital Essentials. On its own merits the food was earning nearly full marks: AAFCO statement present (+1.5), feeding trials not on the label (+0), DMB protein at 56.5% well above the 30% threshold (+1), calorie statement present (+0.5), magnesium declared (+0.5). Before the floor, that is a 9.5. The hard-fail rule drops it to 4.0. You can skip the rest of the math; the other four sub-scores look like this:

1. 01Vital Essentials Freeze-Dried Chicken Mini Patties Cat5.7

The rest of the card is strong: Ingredient Clarity at 9.0, Sensitivity Risk at 7.5, Brand Trust at 7.0, Value at 4.0. What pulls the composite down is the floored nutrition number, not anything wrong with those other dimensions.

The awkward part: chicken hearts are real taurine

Here is what makes this case interesting. Chicken hearts are amongthe richest natural taurine sources of any food. Published values vary by source and preparation, but chicken heart muscle commonly runs 1,000-1,200 mg of taurine per 100g wet weight, and freeze-drying concentrates that further. In practice, a cat eating an ounce of Vital Essentials Freeze-Dried Chicken Mini Patties is almost certainly getting enough taurine to clear AAFCO’s 1,000 mg/kg dry-matter minimum.

So your cat is probably fine. The food is probably fine. The label is the problem.

Why we’re keeping the rule anyway

We work from one core rule: we score what the label proves. We don’t guess nutrient content from an ingredient list, and we don’t credit a food for what a chemist might tell us off the record. If a label says “chicken,” we credit chicken. If it says “taurine,” we credit taurine. If it doesn’t say taurine, we don’t credit taurine, even when the ingredients clearly suggest the recipe has plenty.

That sounds rigid, and it is. We think it is the right kind of rigid here, for one reason that matters to you as a cat owner. When a cat runs short on taurine over time, the result is feline dilated cardiomyopathy (a weakening of the heart muscle) and central retinal degeneration(a loss of vision). Past a certain point, neither one reverses. Cats cannot make enough taurine on their own, which is why AAFCO requires adult cat foods to provide a minimum of 1,000 mg/kg dry matter. A label that leaves taurine off isn’t simply forgetful. In our view it has decided you don’t need to see the number.

For the main food of an animal built to eat meat, that is not a posture we want to wave through. So the rubric reports it.

What you should do with this

It depends on where you are. Two cases:

• If your cat is doing well on Vital Essentials, you don’t need to panic.The food is almost certainly complete in practice, and a 6.0 composite is not a warning, it’s an accounting choice in our methodology. If you want extra confidence, call Vital Essentials customer service and ask for the laboratory-tested taurine value. They will likely have one. If they give you a number, you’ll know the label’s silence is a paperwork gap, not a manufacturing one.
• If you’re shopping for a freeze-dried cat food right now and you would rather not weigh the label-trust question at all, pick a freeze-dried food that declares taurine. Stella & Chewy’s Absolutely Rabbit Dinner Morsels does declare it (the label lists Taurine right after the probiotic stack), and it scored 7.3 in our dataset. Same format, transparent label, different score.

The fix is almost nothing

One small change would clear this entirely, for Vital Essentials and for any other natural freeze-dried cat food in the same spot: add a Guaranteed Analysis line for taurine. AAFCO format, one short line: “Taurine (min) 0.X%.” That’s it. The recipe doesn’t change. The cost of goods doesn’t change. The formulation work is already done, because the food is nutritionally adequate. The label just has to catch up to the recipe.

Until it does, the rubric will keep doing the one thing it is built to do: report what the label can prove.

Why the rule is this blunt on purpose

This case is really a test of the methodology itself. We could have written a softer rule, say deduct two points instead of flooring the score at 4.0. We chose the blunter version so that one signal stays legible to you: when a cat food comes in under 6.5 with a no-taurine flag, you should be able to tell that something specific happened, not just that something generally bad did. The floor and the flag together make the issue clear without overstating it.

And if you’re reading this from the Vital Essentials team: the rule isn’t personal. We’d gladly update the score and drop the editorial framing the day a Guaranteed Analysis update ships.

- The PetScored desk. See the full cat methodology at /methodology/cat-food.