The scores
Royal Canin Persian: C (58/100)
Wellness CORE Cat: A (90/100)
A 32-point difference that spans a full letter grade. Royal Canin Persian sits in C territory while Wellness CORE earns a solid B. This isn't a close matchup where minor formula differences tip the scales — it's a gap wide enough that the two foods belong in fundamentally different quality tiers.
How the ingredients compare
Here are the first five ingredients side by side:
Royal Canin Persian: Chicken By-Product Meal, Chicken Fat, Brewers Rice, Wheat Gluten, Corn
Wellness CORE Cat: Deboned Turkey, Deboned Chicken, Turkey Meal, Chicken Meal, Peas
The difference is striking. Royal Canin leads with chicken by-product meal — a low-quality protein source made from leftover parts like necks, feet, and intestines. Its top five includes two grains (brewers rice and corn) and a plant protein concentrate (wheat gluten). Wellness CORE packs four named animal proteins into its top five — deboned turkey, deboned chicken, turkey meal, and chicken meal. That's the kind of ingredient density you want to see in food for obligate carnivores.
Where Wellness CORE pulls ahead
Four animal proteins in the top five. CORE's formula leads with deboned turkey and deboned chicken, then reinforces with turkey meal and chicken meal. That's four named, high-quality animal protein sources before you even reach the fifth ingredient. Royal Canin doesn't match this protein density anywhere in its formula.
Grain-free with no by-products. CORE avoids grains entirely and uses no by-product meals. There's no corn, no wheat, no soy — three common fillers and allergens that all appear in the Royal Canin Persian formula. For cats with sensitivities, this matters.
Salmon oil for omega-3s. CORE includes salmon oil as a dedicated omega-3 source, supporting skin health, coat quality, and anti-inflammatory function. It's a purposeful addition rather than an afterthought.
Cranberries for urinary health. CORE includes cranberries, which support urinary tract health — a common concern for indoor cats. Royal Canin Persian doesn't offer this. Shop on Amazon →
Where Royal Canin holds its own
Breed-specific kibble shape. Royal Canin designs a unique kibble shape specifically for Persian cats' flat faces, making it easier for brachycephalic cats to pick up and chew their food. This is a genuine quality-of-life feature that CORE, as a general formula, doesn't address.
GLA from safflower oil for coat health. Royal Canin includes safflower oil as a source of gamma-linolenic acid (GLA), which supports the Persian's long, dense coat. It's a targeted addition for a breed with above-average grooming needs.
Psyllium for hairball management. Persians are notoriously prone to hairballs due to their long coats, and Royal Canin includes psyllium seed husks to help move ingested hair through the digestive tract. These breed-specific touches are thoughtful — they're just not enough to overcome a 32-point ingredient quality gap. Shop on Amazon →
The bottom line
Wellness CORE is the clearly better food. Its formula is built around the animal proteins that cats need as obligate carnivores, with four named meat sources in the top five ingredients and no grains, by-products, or cheap fillers. Royal Canin Persian offers some genuinely useful breed-specific supplements — the kibble shape for flat faces, GLA for coat health, and psyllium for hairballs — but these are supplementary benefits layered on top of a mediocre base formula. You can always add a hairball supplement to a better food. You can't supplement your way out of a grain-heavy, by-product-based ingredient list.
Read our full reviews of Royal Canin Persian and Wellness CORE Cat for the complete ingredient breakdowns.