10 Best Costco Brand Dog Foods 2026 in the United States

Kirkland Signature Adult Formula Lamb, Rice and Vegetable Dog Food is designed for adult dogs of all breeds and sizes. The formula contains lamb as the primary ingredient, which is a high-quality protein source. It offers a balanced nutritional profile with a minimum of 23% crude protein, 14% crude fat, and a maximum of 4% crude fiber, ensuring that dogs receive essential nutrients for maintaining their health and energy levels.

The inclusion of whole grain brown rice and a variety of vegetables like carrots and peas contributes to the fiber content and can aid in digestion. Additionally, the formula is enriched with Omega-6 and Omega-3 fatty acids, glucosamine, and chondroitin sulfate, which support healthy skin, coat, and joint health. It also contains probiotics to promote gut health in dogs. However, some dogs may have sensitivities or allergies to grains, and the product does contain rice and barley, which might not be suitable for them.

Kirkland is known for its quality products and reasonable pricing, making it a reliable option for pet owners shopping at Costco. The 40-pound bag size is convenient for extended use, but it does require proper storage to maintain freshness. This dog food seems to cater well to adult dogs without special dietary restrictions and is a cost-effective choice.

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.

Kirkland Signature Expect More Adult Formula Chicken, Rice, and Vegetable Dog Food is designed mainly for adult large breed dogs, emphasizing coat health, digestion, immune support, joints, and balanced nutrition. It features chicken as the primary protein source, supported by rice and vegetables which provide fiber and energy.

This formula aims to meet the nutritional needs of adult dogs without special dietary restrictions like grain-free or limited ingredient. The large 40-pound bag offers great value and convenience. Kirkland, Costco’s in-house brand, is known for providing quality pet food at a reasonable price.

This dog food suits most adult large breed dogs looking for everyday balanced nutrition with good support for joint and coat health, especially for budget-conscious buyers. However, if your dog has specific food sensitivities or requires a specialized diet, this formula may not fully address those needs since it includes common ingredients like rice and chicken. Some picky eaters may have varying preferences for the rice-based flavor.