Is Costco Dog Food Good? A Complete and Honest Review

Is Diamond Dog Food Good? An In-Depth Review

Costco’s Kirkland Signature dog food has grown in popularity among pet owners as a cost-effective option for giving their dogs the greatest nutrition possible. 

Many pet owners wonder, is Costco dog food good, and reviews often highlight its affordability, quality ingredients, and nutritional value. The brand, which is only available at Costco, provides a variety of dog food alternatives at affordable pricing, ranging from grain-inclusive to grain-free. Is it beneficial for your dog, though? In order to provide you with an informed assessment, we will thoroughly examine its ingredients, quality, cost, and user reviews in this review.

Costco’s own brand, Kirkland Signature, is renowned for providing premium goods at reasonable costs. Diamond Pet Foods, a sizable corporation that also manufactures other well-known pet food brands like Taste of the Wild, makes its dog food. Although the company concentrates on using premium meats and grains, Kirkland dog food is made in the United States using ingredients acquired from all over the world.

Is Costco Dog Food Good?

Key Features of Kirkland Dog Food

High-Quality Ingredients

The quality of Kirkland Signature dog food’s ingredients in relation to its cost is one of the main factors influencing dog owners’ decisions. As a key indicator of quality in dog food, the recipes usually list specified animal sources (such as chicken, lamb, or salmon) as the main ingredient. By doing this, you can make sure your dog is getting enough animal protein for strong muscles and general energy.

  • Proteins: High-quality, easily digested meats like chicken or lamb are frequently used as the main source of protein in recipes.
  • Carbohydrates: Brown rice, a healthy, digestible carbohydrate, is used in the grain-inclusive recipes. Sweet potatoes and peas are substitute carbohydrate sources in the Nature’s Domain grain-free line for dogs with grain allergies.
  • Fats and Omega-3s: Omega-3 fatty acids, which are necessary for a glossy coat, healthy skin, and normal brain function, are found in flaxseed and fish meal, which are included in many recipes.

Probiotics and Prebiotics for Digestive Health

Probiotics, which are good microorganisms that promote digestive health, are frequently found in Kirkland Signature dog food. Dogs with sensitive stomachs will particularly benefit from this supplement. When following a new diet, these probiotics can help avoid stomach distress, increase immunity, and improve digestion.

No Artificial Additives

The fact that Kirkland dog food is free of artificial flavours, colours, and preservatives is one of its main selling features. The food is healthier than inferior dog diets that use artificial preservatives since it is naturally preserved with mixed tocopherols, a source of vitamin E.

Costco Dog Food Varieties

Under its Kirkland Signature brand, Costco provides a number of formulae to suit various dietary requirements and life stages:

  • Kirkland Signature Super Premium Adult Dog Formula

Brown rice and chicken combine to create this well-balanced, multipurpose recipe. Most adult canines with moderate activity levels can use it. For good skin and coat, the meal calls for probiotics, sweet potatoes, and omega-3 fatty acids.
Protein: at least 23% (chicken based)
Fat: at least 14%

  • Kirkland Signature Super Premium Puppy Formula

Packed with vital nutrients for developing puppies is the puppy formula. It contains the proper ratio of fats and proteins to promote their growth, as well as DHA, which is essential for brain development.
Minimum Protein: 28%

Minimum Fat: 17%

  • Kirkland Signature Nature’s Domain (Grain-Free Line)

The Nature’s Domain brand provides grain-free solutions for dogs with grain sensitivity that use substitute carbs such sweet potatoes and peas. For dogs who are allergic to chicken, protein choices like beef, turkey, or salmon are excellent.
Protein: ranges from 24% to 27%.
At least 14% Fat

  • Kirkland Signature Healthy Weight Dog Food

This formula, which has fewer calories and fat but still has all the necessary nutrients, is made for dogs who are overweight or less active. Additionally, it contains chondroitin and glucosamine, which help older or larger breeds’ joints stay healthy.

Nutritional Value

Kirkland Signature dog food from Costco usually offers a well-rounded diet. Their typical adult formulae have a protein concentration of 23-26%, which is sufficient for dogs with moderate levels of activity. The grain-free Nature’s Domain range, which offers a little more protein, is a choice for dogs who are more active.
The addition of veggies, probiotics, and omega-3 and omega-6 fatty acids enhances the total health advantages. Kirkland Signature has a great nutritional balance, especially given the price range, even though it isn’t as high in protein as some high-end brands like Orijen or Acana.

Pricing and Value

The cost of Costco’s Kirkland dog food is one of its key benefits. Depending on the area and formula, a 40 lbs bag of Kirkland Signature Adult Dog Food might cost anywhere from $35 to $45. This is much less expensive than high-end brands with comparable ingredients, which makes it a desirable choice for homes with multiple dogs or pet owners on a tight budget.


For example:
For 40 lbs, Kirkland Signature Super Premium Adult Dog Food costs $35 to $45.
For 35 lbs, Kirkland Nature’s Domain Salmon & Sweet Potato Formula costs $40 to $50.


It is a great choice for people looking for value because the price per pound is significantly less than that of many other dog foods with similar ingredients.

Customer Feedback and Experiences

Consumer reviews of Costco’s dog food are generally very favourable, especially when it comes to the product’s affordability. After switching to Kirkland Signature, many pet owners report improvements in their dogs’ energy levels, digestion, and hair health.

Positive Reviews

  • Good Ingredients: A lot of consumers value the premium protein sources and lack of artificial additives, maize and soy.
  • Better Coat & Digestion: After converting to Kirkland food, pet owners frequently observe that their dogs have better skin, shinier coats, and fewer digestive problems.
  • Affordability: A lot of customers praise the company for providing high-quality ingredients at a fair price, which makes it a popular choice for dog owners on a tight bu

Negative Reviews

  • Individual Sensitivities: Legumes like peas, which are frequently included in grain-free meals, may be the cause of certain dogs’ poor performance on grain-free formulas.
  • Restricted Selection: Although Kirkland provides a range of choices, it might not be as comprehensive as some high-end brands that have certain formulae for particular medical conditions, breed sizes, or activity levels.

Recall History and Safety

It’s important to mention that Diamond Pet Foods, the manufacturer of Kirkland Signature dog food, has had some recalls in the past. The most significant occurred in 2012, involving potential salmonella contamination. However, since then, Costco and Diamond Pet Foods have worked to improve safety protocols, and there haven’t been any major recalls involving Kirkland dog food since.

Should You Choose Costco Dog Food?

Reasons to say yes:

  • The first ingredient is premium named beef.
  • Reasonably priced huge bags.
  • No artificial flavours, colours, or preservatives.
  • Omega fatty acids and probiotics were added for improved health.
  • There are solutions that are both grain-inclusive and grain-free.

Drawbacks:

  • Produced by Diamond Pet Foods, a company that has previously experienced recalls.
  • Limited selection in contrast to certain high-end brands.
  • Because of legumes, certain dogs might not perform well on grain-free formulations.

Final Thoughts: Is Costco Dog Food Good?

Yes, many pet owners find Costco’s Kirkland Signature dog chow to be a terrific choice. It is a good option if you want premium ingredients without having to pay premium pricing because it strikes a great mix between quality and price. It provides dependable, well-balanced nourishment that will satisfy the needs of the majority of dogs, even though it might not have the same variety or extremely high protein level as certain premium brands.

As usual, when selecting a food, it’s critical to take your dog’s age, activity level, and unique nutritional requirements into account. To be sure Kirkland Signature is the appropriate choice for your pet, if in question, speak with your veterinarian.

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