10 Best Costco Brand Dog Foods 2026 in the United States

Kirkland Signature Adult Formula Lamb, Rice and Vegetable Dog Food offers real lamb as its main ingredient, providing a good source of digestible protein that suits most adult dogs. It includes egg proteins that add to the quality of nutrition. This dog food is designed to support healthy joints, thanks to added glucosamine and chondroitin, which is especially helpful for dogs that may need extra joint care. Antioxidants like vitamin E, selenium, and zinc are included to support health and immune function. The presence of omega-3 and omega-6 fatty acids helps maintain a shiny coat and supports a healthy immune system.

The product is geared for adult dogs of all breeds but is not specifically formulated for puppies, seniors, or dogs with certain dietary restrictions such as grain allergies. Kirkland, as a Costco house brand, has a solid reputation for providing quality pet foods at a reasonable price, making this a strong option for dog owners looking for balanced nutrition without specialty formulations. Its large 40-pound bag suits households with multiple dogs or those wanting to stock up.

This dog food represents a reliable choice for adult dogs needing good protein, joint support, and general health maintenance, while pet owners with special dietary needs or very young or senior dogs may consider formulas tailored more specifically to those life stages.

The Kirkland Signature Adult Formula Chicken, Rice and Vegetable Dog Food is designed specifically for adult dogs and features fresh chicken as its main ingredient, which is beneficial since chicken and egg proteins are easy for dogs to digest. It includes added glucosamine and chondroitin, supporting joint health, especially for dogs that might need extra care in this area. This formula also contains antioxidants like vitamin E, selenium, and zinc to help maintain a healthy immune system, along with omega-3 and omega-6 fatty acids that promote a shiny coat and overall well-being.

The food provides a balanced approach to nutrition, suited for all breed sizes, and is intended for everyday adult dogs rather than puppies or seniors. The 40-pound bag size is practical for larger households or those who want to buy in bulk from Costco. It is not specifically tailored for dogs with allergies or special medical requirements, but it offers reliable nutrition for general adult dog care.

Kirkland Signature is a well-known Costco brand with a solid reputation for quality at a good price, making this an attractive choice for dog owners who want dependable nutrition without a premium cost. If you’re looking for a straightforward, wholesome adult dog food that covers essentials like protein, joint support, and coat health, this product meets those needs effectively.

Kirkland Signature Nature's Domain Puppy Formula Chicken & Pea Dog Food is designed specifically for puppies, particularly those sensitive to grains, as it offers a grain-free recipe. This makes it a good option if your puppy has food sensitivities or if you prefer to avoid grains in their diet. The food contains added salmon oil, providing DHA, an important omega-3 fatty acid that supports healthy brain and eye development in growing puppies. It also includes antioxidants like selenium and vitamin E, which help support overall health and a strong immune system.

The kibble size is small, which is easier for puppies to chew and digest, especially for smaller breeds. Kirkland is known for delivering high-quality products at a reasonable price, and this formula has received positive user ratings, reflecting customer satisfaction. One possible drawback is that the food is targeted mainly for small breeds, so it may not be the best fit for larger puppies. Additionally, the need to discard unused food after 7 days of opening requires careful portioning to avoid waste.

This puppy food provides a solid, nutritious choice for small breed puppies needing grain-free nutrition with added brain and vision support, backed by a reputable brand.