Castor and Pollux Organix Grain-Free (Dry)

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Rating: ★★★★☆

Castor and Pollux Organix Grain Free Dog Food receives the Advisor’s second-highest tier rating of 4 stars.

The Castor and Pollux Organix Grain Free product line includes 4 dry dog foods.

Each recipe below includes its related AAFCO nutrient profile when available on the product’s official webpage: Growth, Maintenance, All Life Stages, Supplemental or Unspecified.

Important: Because many websites do not reliably specify which Growth or All Life Stages recipes are safe for large breed puppies, we do not include that data in this report. Be sure to check actual packaging for that information.

Use links below to compare price and package sizes at an online retailer.

Castor and Pollux Organix Grain Free Small Breed was selected to represent the other products in the line for this review.

Castor and Pollux Organix Grain Free Small Breed

Dry Dog Food

Estimated Dry Matter Nutrient Content

Protein = 29% | Fat = 17% | Carbs = 46%

Ingredients: Organic chicken, organic chicken meal, organic sweet potatoes, organic chickpeas, organic peas, organic tapioca, organic pea protein, organic sunflower seed meal, organic coconut oil, organic chicken fat (preserved with mixed tocopherols), organic flaxseed, natural flavor, organic chicken liver, organic blueberries, organic alfalfa meal, organic sunflower oil, salt, salmon oil, vitamins (vitamin E supplement, niacin supplement, thiamine mononitrate, d-calcium pantothenate, vitamin A supplement, pyridoxine hydrochloride, riboflavin supplement, vitamin D3 supplement, biotin, vitamin B12 supplement, folic acid), choline chloride, minerals (zinc amino acid complex, iron amino acid complex, copper amino acid complex, manganese amino acid complex, sodium selenite, calcium iodate), potassium chloride, inulin (from chicory root), dried Bacillus coagulans fermentation product, organic rosemary extract

Fiber (estimated dry matter content) = 5.6%

Red items indicate controversial ingredients

Estimated Nutrient Content
MethodProteinFatCarbs
Guaranteed Analysis26%15%NA
Dry Matter Basis29%17%46%
Calorie Weighted Basis25%35%40%
Protein = 25% | Fat = 35% | Carbs = 40%

The first ingredient in this dog food is organic chicken. Although it is a quality item, raw chicken contains up to 73% water. After cooking, most of that moisture is lost, reducing the meat content to just a fraction of its original weight.

After processing, this item would probably account for a smaller part of the total content of the finished product.

The second ingredient is chicken meal. Chicken meal is considered a meat concentrate and contains nearly 300% more protein than fresh chicken.

The third ingredient includes organic sweet potato. Sweet potatoes are a gluten-free source of complex carbohydrates in a dog food. They are naturally rich in dietary fiber and beta carotene.

The fourth ingredient lists organic chickpeas, also known as garbanzo beans. Like peas, bean and lentils, the chickpea is a nutritious member of the fiber-rich legume (or pulse) family of vegetables.

However, chickpeas contain about 22% protein, a factor that must be considered when judging the actual meat content of this dog food.

The fifth ingredient includes organic peas. Peas are a quality source of carbohydrates. And like all legumes, they’re rich in natural fiber.

However, peas contain about 25% protein, a factor that must be considered when judging the meat content of this dog food.

The sixth ingredient is organic tapioca, a gluten-free, starchy carbohydrate extract made from the root of the cassava plant.

The seventh ingredient is organic pea protein, what remains of a pea after removing the starchy part of the vegetable.

Even though it contains over 80% protein, this ingredient would be expected to have a lower biological value than meat.

And less costly plant-based products like this can notably boost the total protein reported on the label — a factor that must be considered when judging the meat content of this dog food.

The eighth ingredient is sunflower seed meal, a by-product of the oil extraction process – and an item more typically found in feed for livestock.

Although sunflower meal contains about 34% protein, it would be expected to have a lower biological value than meat.

And less costly plant-based products like this can notably boost the total protein reported on the label — a factor that must be considered when judging the actual meat content of this dog food.

The ninth ingredient is organic coconut oil, a natural oil rich in medium-chain fatty acids.

Medium-chain triglycerides have been shown to improve cognitive function in older dogs.1

Because of its proven safety2 as well as its potential to help in the treatment of canine cognitive dysfunction syndrome (CDS) and chronic skin disorders, MCT can be considered a positive addition to this recipe.

From here, the list goes on to include a number of other items.

But to be realistic, ingredients located this far down the list (other than nutritional supplements) are not likely to affect the overall rating of this product.

With five notable exceptions

First, this recipe includes organic flaxseed, one of the best plant sources of healthy omega-3 fatty acids. Provided they’ve first been ground into a meal, flax seeds are also rich in soluble fiber.

However, flaxseed contains about 19% protein, a factor that must be considered when judging the actual meat content of this dog food.

Next, we find organic alfalfa meal. Although alfalfa meal is high in plant protein (about 18%) and fiber (25%), this hay-family item is more commonly associated with horse feeds.

In addition, we note the inclusion of inulin, a starch-like compound made up of repeating units of carbohydrates and typically sourced from chicory root.

Not only is inulin a natural source of soluble dietary fiber, it’s also a prebiotic used to promote the growth of healthy bacteria in a dog’s digestive tract.

Next, we note the use of sunflower oil. Sunflower oil is nutritionally similar to safflower oil. Since these oils are high in omega-6 fatty acids and contain no omega-3’s, they’re considered less nutritious than canola or flaxseed oils.

Sunflower oil is notable for its resistance to heat damage during cooking.

There are several different types of sunflower oil, some better than others. Without knowing more, it’s impossible to judge the quality of this ingredient.

And lastly, this food contains chelated minerals, minerals that have been chemically attached to protein. This makes them easier to absorb. Chelated minerals are usually found in better dog foods.

Castor and Pollux Organix
Grain Free Dog Food
The Bottom Line

Since this recipe contains a number of organic ingredients, we feel compelled to grant this line a more favorable status as we consider its final rating.

That’s because organic ingredients must comply with notably more stringent government standards — standards which significantly restrict the use of any synthetic pesticides, herbicides, insecticides, hormones or antibiotics.

With that in mind…

Judging by its ingredients alone, Castor and Pollux Organix Grain Free looks like an above-average dry dog food.

But ingredient quality by itself cannot tell the whole story. We still need to estimate the product’s meat content before determining a final rating.

The dashboard displays a dry matter protein reading of 29%, a fat level of 17% and estimated carbohydrates of about 46%.

As a group, the brand features an average protein content of 29% and a mean fat level of 16%. Together, these figures suggest a carbohydrate content of 47% for the overall product line.

And a fat-to-protein ratio of about 56%.

Near-average protein. Near-average fat. And near-average carbs when compared to a typical dry dog food.

When you consider the protein-boosting effect of the chickpeas, peas, pea protein, sunflower seed meal, flaxseed and alfalfa meal, this looks like the profile of a kibble containing a moderate amount of meat.

Bottom line?

Castor and Pollux Organix Grain Free is a plant-based dry dog food using a moderate amount of named meat meal as its main source of animal protein, thus earning the brand 4 stars.

Highly recommended.

Please note certain recipes are sometimes given a higher or lower rating based upon our estimate of their total meat content and (when appropriate) their fat-to-protein ratios.

Castor and Pollux Dog Food
Recall History

The following list (if present) includes all dog food recalls since 2009 directly related to this product line. If there are no recalls listed in this section, we have not yet reported any events.

You can view a complete list of all dog food recalls sorted by date. Or view the same list sorted alphabetically by brand.

To learn why our ratings have nothing to do with a product’s recall history, please visit our Dog Food Recalls FAQ page.

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Special FDA Alert

The FDA has announced it is investigating a potential connection between grain-free diets and a type of canine heart disease known as dilated cardiomyopathy. Click here for details.

A Final Word

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Notes and Updates

06/22/2018 Last Update

  1. Pan Y et al, Dietary supplementation with medium-chain TAG has long-lasting cognition-enhancing effects in aged dogs, British Journal of Nutrition, Volume 103, Issue 12, June 2010, pp 1746-1754
  2. Matulka RA et al, Lack of toxicity by medium chain triglycerides (MCT) in canines during a 90-day feeding study,Food Chem Toxicol, Jan 2009, 47(1) 35-9.