10 Best Costco Brand Dog Foods 2026 in the United States

The Kirkland Signature Nature's Domain Grain-Free All Life Stages Salmon Meal & Sweet Potato Formula for Dogs is a solid choice for pet owners looking for a nutritious, grain-free option. This dog food features salmon meal and sweet potatoes as primary ingredients, providing a good source of protein (24% minimum) and healthy fats (14% minimum). The inclusion of omega-6 fatty acids supports skin and coat health. With a fiber content of 3% maximum, it aids in digestion, making it suitable for dogs with sensitive stomachs.

This formula is designed for all life stages, from puppies to senior dogs, and is appropriate for all breed sizes. Its grain-free nature makes it ideal for dogs with grain allergies or sensitivities. One of the notable strengths of this product is its high brand reputation; Kirkland Signature is known for its quality and value. Potential drawbacks include the relatively lower maximum fiber content for dogs needing more fiber in their diet and that the product only comes in one flavor option (salmon), which might not be appealing to all dogs. Additionally, the product comes in a large 35 lb bag, which may be less convenient for storage or for those with smaller dogs who don't consume food as quickly.

The Exclusive Signature Chicken & Brown Rice Comfort Care Adult Dog Food stands out for its high-quality protein, making chicken its first ingredient. This supports health by helping with lean muscle development, a strong immune system, and healthy bones. The Comfort Care Digestive Health Support System is another key feature, enhancing digestive health with fiber and prebiotics which can be essential for sensitive stomachs.

The diet is also enriched with antioxidants from sources like blueberries and cranberries, aiding in immune support, and includes glucosamine and chondroitin for joint health, which is beneficial for active or older dogs prone to joint issues. Additionally, this formula is free from corn, wheat, soy, artificial colors, and preservatives, catering to pet owners looking for a cleaner ingredient list free of common allergens and unnecessary additives.

This dog food could be a great option for adults dogs of all breeds, particularly those with digestive sensitivities or joint concerns.

Kirkland Signature Dog Food Variety (Chicken, Rice, and Egg) is designed specifically for senior dogs, especially large breeds, with a focus on joint health. Its main ingredients—chicken, rice, and egg—provide a balanced source of protein and energy suitable for older dogs who may need gentler nutrition. The formula includes important nutrients like Vitamin E, Selenium, Zinc, and Active9 probiotics, which support immune health and digestion.

Weighing 40 pounds, this dry dog food offers good value for pet owners looking for a larger supply. The protein and fat content are appropriate for mature dogs, helping maintain muscle mass without excess calories. Kirkland, as a Costco brand, has a solid reputation for quality at an affordable price, making it a practical choice if you want dependable nutrition without breaking the bank. Some users might prefer formulas with more specialized dietary options if their dog has specific allergies or sensitivities, as this product is more of a general senior formula.

This product is an excellent option for owners seeking a cost-effective, nutrient-rich food to support their aging dog's joint and overall health.