How the KibbleLab Score works

The short answer

Every pet food on KibbleLab receives a score from 1 to 10. That number reflects what we can verify from publicly available product data: ingredient composition, nutritional profile, AAFCO compliance, and health considerations. It's science-based, not marketing-based.

No company can pay for a higher score, or to change what we recommend for your pet. Our ratings are never influenced by money. We do earn affiliate commissions when you buy through some links, but that has no effect on a score. The methodology is the same whether we're evaluating a premium specialty brand or a grocery store kibble.

What goes into the score

The KibbleLab Score evaluates four categories. Each contributes to the final number, weighted by its impact on your pet's nutrition and wellbeing.

1. Ingredient composition

We look at the overall quality of the ingredient list: named protein sources, beneficial functional additions (probiotics, omega fatty acids, antioxidants), and the absence of artificial colors and flavors. We evaluate the formula as a whole, not individual ingredients in isolation.

2. Nutritional profile

Protein, fat, and fiber levels are evaluated relative to the food's stated life stage and format (wet vs. dry). A puppy food is held to different standards than an adult maintenance formula. We reference AAFCO nutrient profiles and published veterinary nutrition guidelines.

3. AAFCO compliance

Every scored food must carry an AAFCO nutritional adequacy statement. We note whether adequacy was established through formulation (calculated to meet nutrient profiles) or feeding trials (tested on actual animals). Feeding trials carry more weight in our scoring because they demonstrate real-world nutritional performance. For more on what AAFCO compliance means, see our AAFCO explainer.

4. Health considerations

This category covers allergen risk, DCM-related concerns for legume-heavy grain-free formulas (per the ongoing FDA investigation), and processing methods that may affect nutrient bioavailability.

What we don't penalize

This is where KibbleLab differs from most pet food review sites. Published veterinary nutrition research consistently shows that several commonly vilified ingredients carry no established risk and are often nutritionally valuable. We don't dock points for:

• By-products. Organ meats are nutrient-dense. The term sounds unpleasant, but veterinary nutritionists consider them high-quality protein sources. Read more in our by-products explainer.
• Grains. Corn, rice, barley, and oats are well-studied, digestible carbohydrate sources for dogs. The idea that grains are "fillers" is a marketing narrative, not a scientific position.
• Preservatives. BHA and BHT (synthetic) and mixed tocopherols (naturally derived) are used at levels well within established regulatory limits. "Natural" preservation isn't inherently better tolerated, and synthetic antioxidants offer better carry-through stability.
• Corn and soy. Both are digestible ingredients with decades of feeding data behind them. Corn provides carbohydrates, protein, and fat; when combined with complementary protein sources (as in most commercial formulas), it contributes meaningfully to the overall nutritional profile.

How scores translate to verdicts

Each score maps to a plain-language verdict so you know what the number actually means for your decision:

• 9.0 to 10: Top Pick. Premium ingredients, optimal nutrition, minimal concerns.
• 8.0 to 8.9: Strong Choice. High-quality ingredients, complete nutrition, few minor concerns.
• 7.0 to 7.9: Solid Option. Quality ingredients, adequate nutrition, some considerations.
• 6.0 to 6.9: Worth a Conversation. Meets nutritional standards, but has moderate concerns worth discussing with your vet.
• Below 6: Not Recommended. Significant nutritional or ingredient concerns.

Score vs. fit

A high score doesn't automatically mean a food is right for your pet. A 9.2-rated food with chicken as its primary protein is a poor fit for a dog with a confirmed chicken sensitivity, regardless of the number.

That's why KibbleLab pairs the score with personalized matching. When you tell us about your pet's life stage, sensitivities, and health goals, we filter by fit first, then rank by score. The result is a recommendation that's both high-quality and appropriate for your specific animal.

What about the manufacturer?

The KibbleLab Score focuses on what's in the bag. But we also surface manufacturer-level signals separately: whether the brand meets WSAVA selection criteria, owns its manufacturing facilities, employs board-certified nutritionists, and has a recall history. These appear as badges on the product page, not as part of the score itself, so you can weigh them in your own decision.

The bottom line

The KibbleLab Score is a starting point, not a final answer. It tells you whether a food meets objective quality standards based on published veterinary nutrition science. Combined with your pet's specific profile, it becomes a recommendation you can trust, not because we said so, but because the evidence supports it.

Based on published veterinary nutrition research (WSAVA, AAFCO, NAVC)

KibbleLab Explains articles are educational, and are not veterinary advice. Before starting an elimination diet, a weight plan, or any major diet change, talk to your veterinarian.