Mature Formula Chicken, Rice & Egg Dry Dog Food
A dry senior dog food formulated for maintenance, this recipe uses chicken and chicken meal as primary protein sources with egg for added high-quality protein. Whole grain brown rice, oatmeal, and barley provide digestible carbohydrates, while added glucosamine, chondroitin, omega fatty acids, and probiotics support joint comfort, skin and coat health, and digestive function in older dogs.
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Strong Choice
This is a complete and balanced dry food designed specifically for adult and senior dogs who no longer need growth nutrition. It offers moderate protein and fat levels that are appropriate for many older dogs, with added joint, skin, and digestive support nutrients. It should suit most healthy senior dogs who do well on a chicken- and grain-based kibble.
Computed from 4 of 4 applicable checks. Missing data is skipped, never counted against a food.
The KibbleLab Score (1–10) is assessed from publicly available product data. Our evaluation is science-based, not marketing-based.
KibbleLab may earn an affiliate commission when you buy through a link. No one can pay for a higher score, or to change what we recommend for your pet.
At a Glance
Where these benefits come from
Benefits the manufacturer highlights in its own product marketing. KibbleLab lists them for reference and does not verify these claims.KibbleLab Review
Strengths
- Chicken and chicken meal provide identifiable animal protein sources as the first ingredients.
- Protein and fat levels are moderate, which is often a good fit for many senior and lower-activity adult dogs.
- Includes glucosamine and chondroitin, which are commonly used to support joint comfort in older dogs.
- Contains probiotics and chicory root to help support a healthy digestive tract, plus omega-3 and -6 fats for skin and coat.
Considerations
- Chicken, egg, and fish are present, so this formula will not work for dogs with allergies to any of those proteins.
- This diet is formulated to AAFCO maintenance standards, so it is not suitable for puppies or pregnant or lactating females.
- Calories are fairly dense per cup, so portion control is important for seniors who tend to gain weight easily.
Full Ingredient List
Ingredients and analysis reflect manufacturer data at the time of our last update and can change without notice. Always check the actual product packaging before feeding.
Ingredient filtering helps identify compatible options but is not a substitute for a veterinary elimination diet.
Top 5 Ingredients Explained
01
Chicken
Chicken is a common animal-based protein in dog and cat foods, supplying essential amino acids, B vitamins, and energy-dense fats that support muscle maintenance, growth, and overall health; for cats it also contributes toward dietary taurine but must be present in sufficient amounts or provided via supplementation. It is prized for its digestibility and palatability, though some pets develop sensitivities or allergies to chicken, and nutritional value and safety depend on ingredient quality and processing—raw chicken carries pathogen risks and whole bones can pose choking or GI hazards.
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02
Chicken
Chicken is a common animal-based protein in dog and cat foods, supplying essential amino acids, B vitamins, and energy-dense fats that support muscle maintenance, growth, and overall health; for cats it also contributes toward dietary taurine but must be present in sufficient amounts or provided via supplementation. It is prized for its digestibility and palatability, though some pets develop sensitivities or allergies to chicken, and nutritional value and safety depend on ingredient quality and processing—raw chicken carries pathogen risks and whole bones can pose choking or GI hazards.
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03
Brown Rice
Brown rice is a whole-grain carbohydrate and fiber ingredient commonly used in dog and cat foods to provide digestible energy, dietary fiber, and modest amounts of B‑vitamins and minerals; it typically offers more nutrients and fiber than white rice. It’s generally well tolerated and can help with sensitive stomachs, but because it is high in carbohydrates (not a primary protein source) and can contain trace inorganic arsenic depending on sourcing, it should be included in balanced formulations and monitored in overweight or diabetic pets.
04
Egg Product
Egg product is used in pet foods as a high-quality, highly digestible animal protein and palatability enhancer, providing complete essential amino acids, fats, vitamins (such as A, D and B12), minerals and choline, and it often serves as a binder or emulsifier when included as whole, dried or concentrated egg. It supplies bioavailable nutrients for dogs and cats but can be a food allergen for some individuals, may be higher in fat depending on yolk content, and should be properly processed (pasteurized or cooked) to reduce microbial risk.
05
Oatmeal
Oatmeal is used in pet foods as a digestible carbohydrate and source of soluble fiber (notably beta‑glucans), serving as a gentle filler or binder that can support healthy digestion and steady energy release. It provides B vitamins and minerals, is generally well tolerated by dogs and many cats when cooked and plain, but should be free of added sugars or flavorings and used cautiously for overweight or diabetic pets or animals with individual grain sensitivities.
Nutritional Breakdown
How to read As Fed versus Dry Matter
As fed shows the numbers straight off the label, water included. Dry matter removes the water so you can compare a wet food and a dry food fairly.What is calorie density
How many calories the food packs per unit. Denser foods mean smaller portions for the same calories.Not sure how much of this to feed?
The right daily portion depends on your dog's weight, age, and activity level. Create a free account, add your dog, and get their daily calories and portion sizes.
Product Details & Brand
Product Specs
AAFCO Nutritional Adequacy
What is AAFCO
Association of American Feed Control Officials. It sets the nutritional
adequacy standards US pet foods are measured against.
What is AAFCO
Association of American Feed Control Officials. It sets the nutritional adequacy standards US pet foods are measured against.Brand
Kirkland Signature is the Costco private-label brand. Its pet food range covers dry and wet dog and cat foods, including the grain-inclusive Super Premium line and the grain-free Nature's Domain line, offering premium-style formulas at value pricing. Production is outsourced to Diamond Pet Foods.
Manufacturer
Costco does not manufacture Kirkland Signature pet food itself; it controls the formulation and outsources production. Kirkland Signature dog and cat foods are manufactured by Diamond Pet Foods.
Manufacturing details are compiled from public sources and not independently verified; they may not reflect contract manufacturing or co-packing.
Recall History
No recall is listed for Kirkland Signature Mature Formula Chicken, Rice & Egg Dry Dog Food.
Source: FDA animal food recall listings back to January 2019 · Checked daily, last on Aug 31, 2026
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Frequently Asked Questions
Has Kirkland Signature ever been recalled?
We have no recalls on record for Kirkland Signature. We track the FDA's animal food recall listings back to January 2019 and publish every pet food recall automatically. A filing that isn't pet food may not appear here.
How does KibbleLab rate foods?
Our scores are based on ingredient composition, nutritional profile, AAFCO compliance, and health considerations. We don't penalize by-products, grains, or synthetic preservatives. Brands cannot pay for higher scores.
Is KibbleLab a substitute for veterinary advice?
No. KibbleLab provides data-driven food analysis, not medical advice. Always consult your veterinarian before making dietary changes, especially for pets with health conditions.
KibbleLab provides informational content only. This is not veterinary advice. Always consult a qualified veterinarian before changing your pet's diet.
KibbleLab may earn affiliate commissions through product links. No one can pay for a higher score, or to change what we recommend for your pet.
Product data sourced from manufacturer websites, AAFCO statements, and FDA recall listings. Last verified dates reflect our most recent data check. We track the FDA's animal food recall listings back to January 2019 and publish every pet food recall automatically. A filing that isn't pet food may not appear here.
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