Is Hill’s Prescription Diet Metabolic Good for Cats? An Ingredient-by-Ingredient Breakdown

What’s actually in Hill’s Prescription Diet Metabolic for cats?

We analyzed Hill’s Prescription Diet Metabolic Weight Management Chicken Flavor dry cat food. The formula leads with chicken by-product meal — a rendered product made from the parts of chicken not used for human consumption, including organs, bones, necks, and feet. It’s a concentrated protein source, but a lower-quality one than chicken meal (which excludes heads and feet) or whole chicken.

Brewers rice at position two is a highly refined grain byproduct. Corn gluten meal at three is a plant protein that boosts label numbers. Powdered cellulose at four is wood pulp fiber designed to create satiety. Dried tomato pomace at five and flaxseed at six add some fiber and omega-3s. No fresh or whole chicken appears anywhere in this formula — an unusual omission for a cat food, given that cats are obligate carnivores. Shop on Amazon →

The good stuff

Flaxseed at position six provides plant-based omega-3 fatty acids, and coconut oil at position eight contributes medium-chain triglycerides that support metabolism. L-Carnitine helps transport fatty acids for energy production during weight loss. Carrots provide a whole-food source of beta-carotene. Dried tomato pomace adds antioxidants and fiber. Dried beet pulp provides prebiotic fiber for gut health.

The formula does include taurine supplementation, which is essential for cats (taurine deficiency causes heart disease and blindness in cats). Mixed tocopherols for natural preservation. The fiber content from cellulose and beet pulp is specifically designed to create satiety so the cat feels full while eating fewer calories — the same approach used in the dog version.

The not-so-good stuff

Chicken by-product meal as the first ingredient is the biggest red flag. By-product meal includes rendered parts that are nutritionally inferior to clean chicken meat. For an obligate carnivore, this is a disappointing lead ingredient — especially in a prescription diet costing $50–70 per bag. Wheat gluten at position eight is another plant protein used to inflate protein numbers without the biological value of animal protein.

Corn gluten meal at three and wheat gluten at eight mean two plant-based protein concentrates in the top eight ingredients of a cat food. Powdered cellulose is nutritionally empty wood pulp. No fish oil (present in k/d and c/d), no prebiotics like FOS, no chelated minerals. Chicken liver flavor is a palatability enhancer because the base formula lacks the natural flavor appeal of real chicken. This is the only Hill’s Rx formula we’ve reviewed that leads with a by-product ingredient.

How it compares

At C/57, Hill’s Prescription Diet Metabolic Cat is the lowest-scoring Hill’s Prescription Diet formula we’ve reviewed — 3 points below the standard Hill’s Science Diet Cat (C/60) and 19 points below the k/d Kidney Care Cat (B/76). The dog version Metabolic Dog (C/58) scores 1 point higher.

See the full Hill’s Prescription Diet Metabolic vs Hill’s Science Diet (Cat) comparison for a detailed side-by-side breakdown.

For non-prescription weight management, Blue Buffalo Cat (B/76) and Wellness Cat (B/80) offer substantially better ingredient quality, though they aren’t specifically formulated for clinical weight loss.

The bottom line

Hill’s Prescription Diet Metabolic Cat earns a C grade (57/100) from KibbleIQ. The ingredient quality is below average — chicken by-product meal as the lead ingredient in a cat food is a low bar for a premium prescription product. The weight management science (fiber for satiety, L-Carnitine for fat metabolism) is sound, but the ingredient sourcing doesn’t match the price tag. If your vet prescribed Metabolic for feline obesity, follow through with the weight loss program — obesity is a serious health risk for cats. Once your cat reaches target weight, discuss transitioning to a higher-quality maintenance food like Wellness (B/80) or Blue Buffalo Cat (B/76). Shop on Amazon →