Kirkland Signature Nature s Domain Cat Food 18 lbs.

Common questions

Is Kirkland Signature Nature s Domain Cat Food 18 lbs. healthy?

Kirkland Signature Nature s Domain Cat Food 18 lbs. scores 65/100 on Scout's independent analysis of ingredients, additives, and lab results — a fair-to-good score — solid, with tradeoffs. This cat food contains high-quality protein sources like salmon and salmon meal, which are beneficial for feline health.

How processed is Kirkland Signature Nature s Domain Cat Food 18 lbs.?

Kirkland Signature Nature s Domain Cat Food 18 lbs. is NOVA Group 3: Processed Foods.

Which ingredients drive Kirkland Signature Nature s Domain Cat Food 18 lbs.'s score?

In Scout's ingredient-by-ingredient analysis, Salmon, Salmon meal, Fish meal count in its favor; Natural flavor is flagged as an ingredient of concern. The full breakdown, with why each one matters, is in the Key ingredients section on this page.

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Kirkland Signature Nature s Domain Cat Food 18 lbs.

65 Fair

Analysis updated August 2026 · How Scout scores

18 lb
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At a glance

Beneficial ingredients 7
Harmful ingredients 1
Category Pet Food
Summary

This cat food contains high-quality protein sources like salmon and salmon meal, which are beneficial for feline health. However, the presence of canola oil and the vague 'natural flavor' ingredient detracts from its overall quality. The product is moderately processed, which limits its score despite the inclusion of nutritious ingredients like sweet potatoes and salmon oil.

Key ingredients 10

Salmon
Very Good

Salmon is a high-quality source of protein and omega-3 fatty acids. It supports healthy skin and coat in cats. Wild-caught salmon is preferred for its lower contaminant levels.

Risks

Potential risk of mercury and other contaminants if not sourced sustainably.

Benefits

Rich in omega-3 fatty acids which support heart health and reduce inflammation. Provides essential amino acids for muscle maintenance.

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Salmon oil
Very Good

Salmon oil is a rich source of omega-3 fatty acids, particularly EPA and DHA. It supports cardiovascular health and reduces inflammation. Cold-pressed extraction preserves its beneficial properties.

Benefits

Supports healthy skin and coat, and provides anti-inflammatory benefits.

Salmon meal
Good

Salmon meal is a concentrated source of protein and omega-3 fatty acids. It is made by cooking and drying salmon to remove moisture. Provides a dense nutrient profile beneficial for cats.

Risks

May contain higher levels of contaminants if not sourced from quality suppliers.

Benefits

Offers a high protein content that supports muscle development and maintenance. Contains omega-3 fatty acids beneficial for skin and coat health.

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Fish meal
Good

Fish meal is a protein-rich ingredient derived from whole fish or fish cuttings. It is processed to remove moisture and fat, concentrating the protein content. Provides essential nutrients for cats.

Risks

Potential for contamination with heavy metals or toxins if not sourced responsibly.

Benefits

High in protein and essential fatty acids, supporting overall health and vitality in cats.

Sweet potatoes
Good

Sweet potatoes are a nutritious source of carbohydrates and fiber. They provide vitamins and minerals such as vitamin A and potassium. Their natural sweetness can enhance palatability.

Benefits

Rich in dietary fiber which aids in digestion. Provides antioxidants that support immune health.

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Potatoes
Good

Beneficial ingredient — whole-food or functional value in this product class.

Risks

High glycemic index may affect blood sugar levels if consumed in excess.

Benefits

Provides a source of energy and some essential nutrients like vitamin C and potassium.

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Peas
Good

Peas are a good source of plant-based protein and fiber. They contain vitamins and minerals such as vitamin K and manganese. Peas can support digestive health and provide energy.

Benefits

Rich in fiber which supports healthy digestion. Provides plant-based protein and essential nutrients.

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Pea protein
Neutral

Pea protein is a plant-based protein source used to boost protein content. It is less bioavailable than animal proteins. Often used in combination with other protein sources.

Risks

May not provide a complete amino acid profile compared to animal-based proteins.

Benefits

Contributes to overall protein content, supporting muscle maintenance.

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Canola oil
Neutral

Canola oil is a source of omega-3 and omega-6 fatty acids. It is used to enhance the fat content and palatability of pet foods. In pet food, it is considered neutral due to its role in providing essential fatty acids.

Benefits

Provides essential fatty acids that support skin and coat health.

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Natural flavor
Bad

Natural flavor is a vague term that can encompass a variety of flavoring agents. It lacks transparency and may include additives or processing aids. Its inclusion is often criticized for not providing clear ingredient information.

Risks

Potential for undisclosed additives or allergens.

Benefits

Enhances palatability, making the food more appealing to pets.

See more about Natural flavor →

Processing

Group 3 · Processed

Processed Foods

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