Homemade cat food: why it usually goes wrong

Most homemade cat food is nutritionally incomplete, and the deficiencies take months to show up — by which point the damage may be done. Published analyses of home recipes for cats have repeatedly found the majority fail to meet established nutrient requirements, often on several nutrients at once. The problem is not the cooking. It is that a cat's requirements are unusually strict and a recipe written by someone who is not a nutritionist has no way of knowing whether it hits them.

Why cats are harder to cook for than dogs

A cat is an obligate carnivore. That is not a marketing phrase — it describes metabolic machinery that has genuinely been lost. Cats cannot make several compounds that other mammals synthesise for themselves, so those have to arrive pre-formed in the diet, every day, in the right amount.

The practical consequence is that a cat's diet has less tolerance for error than a dog's. A dog on a slightly imbalanced home diet drifts. A cat on one can develop a specific, named, sometimes irreversible condition.

The nutrients that break first in home cooking:

Notice how many of these are "cats cannot make this themselves". That is the whole story in one column.

The four ways home recipes fail

They are not formulated. A recipe that lists "chicken thigh, pumpkin, a spoon of oil" has not been checked against any nutrient profile. It was checked against whether the cat ate it.

The supplement is guessed. Recipes that do include a supplement usually name a product without specifying the amount for that cat's weight, or assume a supplement designed for a different base recipe.

The cook substitutes. Turkey instead of chicken is fine. Swapping the calcium source, dropping the oil because the cat left it, or halving the supplement because the tub is expensive is not. Home diets erode over weeks as convenience takes over.

Nobody measures. "A handful" is not a unit. Formulated home diets are specified by weight in grams, and a kitchen scale is non-negotiable.

The taurine point, stated plainly

Taurine deficiency in cats causes dilated cardiomyopathy and central retinal degeneration. Commercial complete-and-balanced foods have supplemented taurine since the link was established in the 1980s, which is why the problem largely disappeared from cats eating them. Home diets reintroduce it.

We are not going to print a taurine dose here, and you should be suspicious of any website that does. The correct amount depends on the rest of the recipe — what the meat already provides, how it is cooked, how much is fed. That calculation belongs to a veterinary nutritionist working from your actual recipe.

The only version that works

If you want to feed home-prepared food, the route is a consultation with a board-certified veterinary nutritionist. They will produce a formulated recipe specific to your cat, with weights, named supplements and doses, and a list of permitted substitutions. Expect a one-off consultation fee, ongoing supplement costs, and rechecks.

That is a real option and there are genuine reasons to take it — a cat with multiple food intolerances, or a medical condition where no commercial diet fits. What it is not is cheaper or easier than buying food. Our pet cost calculator is useful for comparing the real monthly figure before you commit.

If you want the "fresher food" feeling without the risk

Most owners drawn to home cooking want higher moisture, more animal protein, and fewer unidentifiable ingredients. All three are available without formulating anything:

• Feed more wet food. It is roughly three-quarters water and generally lower in carbohydrate — see wet vs dry cat food.
• Choose a food with named meat ingredients high on the list, using how to read a cat food label.
• Add plain cooked meat as a topper, capped at around 10% of daily calories so it cannot unbalance the complete food underneath it.

That last point is the safe middle ground. A small amount of plain cooked chicken on top of a complete diet changes almost nothing nutritionally. Ninety percent of the bowl being home-cooked changes everything.

What to do next

If your cat is currently on a home diet you assembled yourself, book a vet appointment rather than stopping abruptly — an abrupt switch in a cat can trigger a food refusal, and a cat that stops eating for more than a day or two is an urgent problem, not a stubborn one. Bring the recipe with you. If you are only considering it, price up a nutritionist consultation first, then decide whether the commercial route with a better food and more wet feeding gets you most of what you were after.