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 Kirkland Signature Nature's Domain Turkey Dog Food is a solid choice for dog owners looking for a grain-free formula. One of its key strengths is that it caters to all life stages, meaning it can be fed to puppies, adults, and senior dogs, making it versatile. The inclusion of probiotics and prebiotics is beneficial for digestive and immune health, which is a plus for dogs with sensitive stomachs.

Additionally, it's supplemented with antioxidants and omega fatty acids, promoting health and vitality. The turkey flavor and high protein content make it a nutritious option for active dogs. The formula's grain-free nature might be ideal for dogs with grain allergies or sensitivities. This product is particularly recommended for active and senior dogs, as specified in its uses and age range description.

Another point to consider is the brand reputation; Kirkland, as a Costco brand, is generally well-regarded for offering good value for money. On the downside, the 35-pound bag size might be cumbersome for some pet owners to handle and store.

Kirkland Signature Healthy Weight Formula dog food is designed for adult dogs that need to manage their weight. It offers a lower calorie count (275 calories per cup) to help overweight dogs slim down safely. The addition of glucosamine and chondroitin supports joint health, which is a nice bonus for dogs that might have stiffness or arthritis concerns. The food also provides antioxidants like vitamin E, selenium, and zinc, plus omega fatty acids that promote a shiny coat and strong immune system.

It’s made with chicken and vegetables, giving it a familiar and generally healthy ingredient profile, suitable for most breeds and sizes. This formula is specifically for adult dogs and focuses on weight management but does not cover special medical diets beyond joint and immune support. Kirkland Signature has a solid reputation at Costco for delivering good quality at an affordable price, and customer reviews are generally positive, averaging 4.4 out of 5 stars.

This food is a sensible choice for dog owners looking to help their pet lose weight without sacrificing essential nutrients and joint care. Those needing special diet formulations might want to consult a vet or explore additional options.