The scores
Wellness Complete Health Indoor: B (80/100)
Blue Buffalo Indoor Health: B (76/100)
A 4-point gap within the same letter grade. Both land squarely in B territory - the top tier of mainstream cat food. Wellness holds the number one spot in our cat food rankings, with Blue Buffalo right behind. This is a close matchup between two genuinely good formulas.
Read our full reviews of Wellness and Blue Buffalo for the complete ingredient breakdowns.
How the ingredients compare
Here are the first five ingredients side by side:
Wellness: Deboned Chicken, Chicken Meal, Rice, Ground Barley, Ground Brown Rice
Blue Buffalo: Deboned Chicken, Chicken Meal, Brown Rice, Barley, Oatmeal
The similarity is striking. Both lead with deboned chicken and chicken meal - two named animal proteins before any carbohydrate. That's exactly what you want for an obligate carnivore. The grain choices differ slightly (Wellness uses rice and ground barley; Blue Buffalo uses brown rice, barley, and oatmeal), but both avoid corn, wheat, and soy entirely. These are two of the cleanest ingredient lists in commercial cat food.
Where Wellness pulls ahead
Probiotics and digestive support. Wellness includes chicory root extract as a prebiotic fiber source that feeds beneficial gut bacteria, plus a cleaner overall digestive support profile. Blue Buffalo relies more on powdered cellulose (essentially wood pulp) for its fiber, which is functional but far less nutritious. For cats with sensitive stomachs, Wellness's approach is more thoughtful.
Salmon oil. Both formulas include omega-3 sources, but Wellness's salmon oil delivers marine-sourced EPA and DHA directly - the forms cats can actually use. Cats are poor converters of plant-based ALA to EPA/DHA, so the salmon oil gives Wellness a meaningful edge in coat health and inflammation management.
No pea protein padding. Blue Buffalo's ingredient list includes pea starch, pea protein, and pea fiber - three separate entries from the same base ingredient. This is ingredient splitting that inflates the protein percentage with plant sources. Wellness avoids this entirely, keeping its protein profile cleaner and more animal-based.
Simpler formula. Wellness has a shorter, more focused ingredient list without the filler ingredients that weigh Blue Buffalo down. No powdered cellulose, no alfalfa meal - just straightforward chicken-and-grain nutrition with targeted supplements. Shop on Amazon →
Where Blue Buffalo holds its own
LifeSource Bits. Blue Buffalo's signature inclusion is a blend of antioxidants, vitamins, and minerals cold-formed to preserve potency. Whether the cold-forming process delivers meaningfully better nutrient retention is debatable, but it's a unique approach that no other mainstream brand offers.
L-carnitine. This amino acid helps convert fat into energy, which is particularly relevant for indoor cats prone to weight gain. It's one of the more evidence-backed weight management ingredients in pet food. Wellness doesn't include it.
Wider availability and price. Blue Buffalo is one of the most widely distributed premium cat foods in the US, available at grocery stores, pet stores, and online retailers. It frequently goes on sale, making it one of the better values in the B tier. Wellness can be harder to find at the same price points. Shop on Amazon →
The bottom line
Wellness edges ahead with a cleaner ingredient list, better omega-3 sourcing via salmon oil, and no pea protein padding. The 4-point gap is real but narrow - this is the difference between the best and second-best cat foods in our database, not a dramatic quality gap. Blue Buffalo's L-carnitine and wider availability are genuine advantages. If your cat is thriving on either brand, there's no urgent reason to switch. But if you're choosing between the two for the first time, Wellness's more complete supplement profile gives it the slight edge.