What's actually in Purina Cat Chow?
We analyzed Purina Cat Chow Complete Chicken, one of America's best-selling cat foods. The first five ingredients are ground yellow corn, poultry by-product meal, corn gluten meal, whole wheat flour, and animal fat.
Ground yellow corn at #1 is a cheap carbohydrate filler that provides starchy calories but minimal nutritional value for obligate carnivores. Cats have no biological requirement for corn — their digestive systems are designed to process animal protein. Poultry by-product meal at #2 is rendered from unnamed poultry parts excluding muscle meat. Corn gluten meal at #3 is a corn processing byproduct that boosts protein percentages on the label without providing the animal-sourced amino acids cats actually need. Whole wheat flour at #4 adds another grain cats don't need. Animal fat at #5 doesn't specify a species. Shop on Amazon →
The good stuff
Purina Cat Chow is one of the most affordable and widely available cat foods in America. It's in every grocery store, every Walmart, every Target. For cat owners on an extremely tight budget, it meets AAFCO minimum nutritional standards and provides calories.
The formula includes some whole grain nutrients from the corn and wheat — B vitamins, fiber, and trace minerals. It's fortified with essential vitamins and minerals to meet minimum requirements. The food has a long shelf life and consistent formulation — you know what you're getting bag after bag.
The not-so-good stuff
Corn as the first ingredient is the fundamental problem. Cats are obligate carnivores — they require animal protein for essential amino acids like taurine and arginine. A formula where corn outweighs all animal ingredients combined is biologically inappropriate, regardless of whether it meets minimum AAFCO standards.
The double corn issue (ground yellow corn #1 + corn gluten meal #3) means corn derivatives likely constitute the single largest component of this food by weight. Corn gluten meal specifically exists to inflate protein numbers — it makes the guaranteed analysis look better than the actual animal protein content warrants.
Whole wheat flour at #4 adds a second grain and a common allergen. Between corn and wheat, this formula contains the two grains most likely to trigger food sensitivities in cats. The unnamed "animal fat" at #5 doesn't specify a species — you don't know what animal it came from.
The frustrating part: Purina clearly knows how to make better cat food. Purina Pro Plan (C/56) scores 18 points higher, and Purina ONE (D/52) scores 14 points higher. Cat Chow is their budget play — and cats pay the nutritional price.
How it compares
Purina Cat Chow's D/38 ties it with 9Lives (D/38) — both built on the same by-product-and-corn foundation from different manufacturers. It sits above Meow Mix (F/18) and Friskies (D/37) by avoiding the absolute worst ingredients (artificial colors, BHA/BHT) that push those brands into F territory.
The upgrade math is simple: Iams (C/62) costs modestly more and scores 20 points higher with chicken first instead of corn. Taste of the Wild (B/76) scores 38 points higher and puts real fish protein first. Even within Purina's own lineup, stepping up to Purina ONE (D/52) is a 14-point improvement.
The bottom line
Purina Cat Chow Complete earns a D grade (38/100) from KibbleIQ. Corn-first, by-product-heavy, and grain-loaded — this formula feeds the corporate bottom line more effectively than it feeds your cat. It meets minimums, which is the bare legal requirement. If budget allows any flexibility, upgrading to a C or B grade cat food is the single most impactful change you can make for your cat's nutrition. Obligate carnivores need meat, not corn. Shop on Amazon →
Sources
- AAFCO (Association of American Feed Control Officials) feline adult-maintenance profile and ingredient-naming rules.
- FDA Pet Food Recall & Withdrawal Database. Purina's mainstream cat lines appear in the FDA recall history; the database is the authoritative source for brand-specific review.
- WSAVA Global Nutrition Guidelines on the difference between meeting AAFCO minimums and delivering optimal feline nutrition through named-protein-first formulation.