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Can You Trust Online Pet Food Grading Charts? — A Veterinarian’s Real Selection Criteria for 2026

DigestiveTop PicksMeongsiljang Veterinary Advisory Board

How much should you trust the dog food grading charts floating around online? We’ve compiled everything from the criteria used for these ratings to tips on choosing high-quality food, all based on veterinary nutrition textbooks.

Can You Really Trust Dog Food Grades?

A puppy sitting in front of its food bowl, surrounded by fresh ingredients.

The "pet food grading charts" circulating online are not based on any official standards. No recognized authority, such as the Association of American Feed Control Officials (AAFCO) or the National Research Council (NRC), has ever assigned grades to pet foods. The commonly seen 1-to-6 grading system found online is an informal classification created by consumers and industry players based on ingredient quality and nutritional formulation. Rather than relying on these grading charts, the three factors that truly matter are: the first ingredient listed, the protein content, and whether the food carries AAFCO certification.

What Are the Criteria for Pet Food Grades?

This is the most important criterion when classifying pet food grades.

Quality of primary ingredients: Check whether fresh or dehydrated meat is listed as the first ingredient, or if by-products and meat meals make up the main ingredients.

Grain inclusion: Determine whether the formula relies on low-cost grains like corn, wheat, and soybeans; uses high-quality grains such as brown rice and oats; or is grain-free.

Artificial additives: Check for the presence of artificial colors, artificial flavors, and synthetic preservatives like BHA and BHT.

Nutritional formulation: Whether the food has passed feeding trials according to the Association of American Feed Control Officials (AAFCO) standards is also a key indicator.

Grade Classifications at a Glance

This is a feed grade classification commonly used in the community and industry. While not an official standard, it can serve as a useful reference when comparing pet foods.

Grade	Characteristics	Example Main Ingredients
Holistic	Organic, human-grade raw materials; minimal processing	Organic chicken, free-range lamb
Super Premium	Fresh meat as main ingredient; no synthetic additives	Dehydrated chicken, salmon
Premium	Meat-based main ingredients; may include quality grains	Chicken, brown rice, oats
Standard	Contains meat by-products; high grain content	Poultry by-products, corn
Economy	By-products as main ingredients; numerous artificial additives	Meat and bone meal, corn gluten

What Makes Premium-Grade Pet Foods Different?

Premium-grade pet foods stand out for several key reasons. Transparent ingredient labeling: Specific single meat sources, such as "chicken" or "salmon," are clearly listed. Vague terms like "poultry" or "meat by-products" are avoided. Minimal processing: The emphasis is on processing methods that preserve the nutritional quality of the ingredients as much as possible. However, the extent to which specific processing methods benefit nutrient retention can vary depending on the product and the characteristics of the ingredients. Inclusion of functional ingredients: These foods often contain functional components such as probiotics, omega-3 fatty acids, and glucosamine. When evaluating whether a pet food is of good quality, it is more important to examine its nutritional formulation than its price tag. A more accurate assessment involves verifying whether the food meets the complete and balanced nutrition standards set by the Association of American Feed Control Officials (AAFCO) through formulation or feeding trials, and whether the ingredient list and guaranteed analysis align with your pet's life stage. A higher price alone does not necessarily indicate superior nutritional value.

An illustration showcasing the expanded range of high-quality ingredients used in premium pet food.

Why You Shouldn’t Blindly Trust Pet Food Rating Charts

Online pet food rating charts vary depending on who created them. The same product might be labeled “premium” in one chart and “super premium” in another. What matters more than the rating is whether the food is right for your pet. The ideal diet depends on factors like allergies, digestive health, activity level, and age, so consulting a veterinarian is the most reliable way to choose.

5-Point Checklist for Choosing Good Pet Food

Here are practical criteria for choosing pet food that go beyond simple ratings.

Check the first ingredient: Make sure the first ingredient listed is a specific animal protein source, such as chicken or salmon.

Meets AAFCO standards: Look for the phrase “complete and balanced nutrition” on the packaging.

Avoid artificial additives: Choose products free of artificial colors, BHA, BHT, and ethoxyquin.

Monitor your pet’s response: Observe stool quality, coat condition, and energy levels for 2 to 4 weeks.

Consult your veterinarian: Especially if your pet has allergies or existing health conditions, seek your vet’s recommendation.

An illustration of a pet owner carefully checking the label on a bag of pet food.

How to Read the Ingredient Label

The ingredient list on the back of pet food packaging is arranged in descending order by weight, so the first three ingredients are the most important.

Positive sign: Clear, specific terms such as "chicken," "salmon," or "dehydrated chicken" that identify the exact animal and part used.

Caution sign: Vague terms such as "poultry by-product," "animal fat," or "meat and bone meal" that do not specify the source.

Key check: Also review the guaranteed analysis for nutrients like "crude protein" and "crude fat." The Association of American Feed Control Officials (AAFCO) sets minimum requirements for essential nutrients at each life stage, so it is important to verify on the packaging whether the food meets these standards as a complete and balanced diet.

Tips for Choosing Food by Age and Body Type

Choose a diet that suits your pet’s age and body type.

Puppy (up to 12 months): During the growth phase, feed a puppy-specific formula with higher protein and calcium content. Large-breed puppies require a dedicated large-breed puppy formula, as excessive calcium can lead to skeletal issues.

Adult (1–7 years): Select a diet appropriate for your pet’s activity level and weight. After neutering or spaying, lower-calorie options can help with weight management.

Senior (7 years and older): We recommend senior-specific formulas designed to support joint and kidney health. Easily digestible ingredients are key.

An illustration showing a puppy, an adult dog, and a senior dog each sitting in front of their respective food bowls.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

Are grain-free diets always better?

Not necessarily. Grain-free diets can be helpful if a grain allergy or specific food sensitivity has been diagnosed. However, the fact that carbohydrates are not an essential nutrient for dogs does not mean that grain-free food is essential for all puppies. The most suitable diet depends on each dog's individual health status and nutritional needs. It is safest to consult with your veterinarian before making a decision.

Are there any precautions to keep in mind when changing your pet’s food?

Sudden changes can cause digestive upset. It’s recommended to gradually transition by mixing a small amount of the new food with the old food over several days. If diarrhea or vomiting occurs during the transition, slow down the process, and consult your veterinarian if symptoms persist.

Does expensive pet food always mean it’s better?

A higher price doesn’t necessarily mean a better pet food. It’s more accurate to assess nutritional adequacy by checking whether the food meets the Association of American Feed Control Officials (AAFCO) complete and balanced nutrition standards, as well as reviewing the ingredient list and guaranteed analysis values such as crude protein and crude fat. Developing the habit of verifying this information yourself is more important than focusing on price alone.

Is it bad if pet food contains "by-products"?

By-products aren’t inherently bad. Organs like the liver and heart are actually nutrient-dense parts of the animal. However, vague terms like “poultry by-products” lack transparency because they don’t specify which parts are included.

What should I do if my dog refuses to eat its food?

If your pet suddenly refuses to eat, it could be a sign of a health issue, so please consult a veterinarian first. If there are no underlying health concerns, you can try adding a small amount of topper or slightly soaking the food in warm water to improve its palatability.

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References

[1] Applied Veterinary Clinical Nutrition, 2nd Ed — Chapter 8: Commercial and Home-Prepared Diets (Andrea J. Fascetti, Sean J. Delaney)

[2] Clinical Medicine of the Dog and Cat, 4th Ed — Chapter 25: Nutritional Therapy

[3] Small Animal Clinical Nutrition, 5th Ed — Chapter 5: Commercial Foods

[4] The Dog Care Handbook: Things I Wish My Vet Had Told Me — Nutrition Chapter