Kirkland Signature Nature’s Domain

Review Details
Website Kirkland
Available from Costco
Kirkland Signature Nature's Domain

Kirkland Signature Nature’s Domain

Kirkland is made by Diamond Petfoods, known for making a number of premium brands including Taste of the Wild. That’s not a bad thing, especially when this food comes with a Costco price tag.

The main ingredient is salmon meal which is a good choice, far better than the grains or by-products we find in other supermarket and big name brands. It’s backed up by ocean fish meal to ensure the food is rich in protein our cats can digest.

The main carbs come from sweet potato, and although cats don’t really need carbs it’s definitely a better option than grains or regular potato which is higher GI. We do find potato as the fifth ingredient, but it has to be noted the overall estimated carbs is a relatively low 36%.

Peas and pea protein as the 4th and 6th ingredients will account for some of the protein in the food as well as fibre. Peas aren’t a bad ingredient, but for cats it’s an inferior ingredient to meat.

Canola oil is included as a good source of omega 3 to help protect against kidney and heart disease, aid joint health, and help your cat maintain a healthy coat. It would be nice to see the inclusion of flaxseed as well, but this is sadly lacking – it’s something we find in other quality foods. That said, we have a range of vitamins, minerals, as well as fruits and veggies. They’re quality vitamins and minerals too, so no skimping of cost compared to other brands – they’re some of the best sources of vitamins and minerals available.

There may be better foods, but bucket loads are far worse. This is well deserving of 4 stars, border line 5 stars. If you live near Costco then it’s a good option for both your cat and your wallet.

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Where to buy?

Only available at CostCo.

Guaranteed Analysis

* Carbohydrates aren’t listed on pet food labels. This value is calculated based on levels of protein, fat, moisture, and ash. Estimated values for moisture and ash have been used where these values haven’t been given (moisture of 10%, and ash of 8%).


Salmon meal, ocean fish meal, sweet potatoes, peas, potatoes, pea protein, canola oil, natural flavor, choline chloride, DL-methionine, taurine, dried chicory root, tomatoes, blueberries, raspberries, yucca schidigera extract, dried Lactobacillus acidophilus fermentation product, dried Bifidobacterium animalis fermentation product, zinc proteinate, vitamin E supplement, niacin, manganese proteinate, copper proteinate, zinc sulfate, manganese sulfate, copper sulfate, thiamine mononitrate (vitamin B1), vitamin A supplement, biotin, potassium iodide, calcium pantothenate, riboflavin (vitamin B2), pyridoxine hydrochloride (vitamin B6), vitamin B12 supplement, manganous oxide, sodium selenite, vitamin D supplement, folic acid.