Castor and Pollux Natural Ultramix Indulgent Mix (Canned)

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Rating: ★★★★★

Castor and Pollux Natural Ultramix Indulgent Mix canned dog food receives the Advisor’s highest tier rating of 5 stars.

The Castor and Pollux Natural Ultramix Indulgent Mix product line includes six grain-free canned 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.

  • Indulgent Mix Venison, White Potatoes and Carrots [A]
  • Indulgent Mix All-Beef Sausage Links and Sweet Potato [A]
  • Indulgent Mix Beef Tripe & Chicken, Apples and Green Peas [A]
  • Indulgent Mix Whole Chicken Thigh, Carrots and Sweet Potato [A]
  • Indulgent Mix Duck & Venison, Green Beans with Wild Rice (4.5 stars) [A]
  • Indulgent Mix Minced Chicken & Bacon with Fresh Tomatoes (4.5 stars) [A]

Castor and Pollux Natural Ultramix Grain Free Indulgent Mix Beef Tripe and Chicken, Apples and Green Peas was selected to represent the other products in the line for this review.

Castor and Pollux Natural Ultramix Grain Free Indulgent Mix Beef Tripe and Chicken, Apples and Green Peas

Canned Dog Food

Estimated Dry Matter Nutrient Content

Protein = 50% | Fat = 17% | Carbs = 25%

Ingredients: Beef tripe, beef broth, beef, chicken, carrots, dried egg product, beef liver, green beans, sweet potatoes, apples, potato starch, sunflower oil, dried peas, calcium carbonate, pea protein, natural flavor, sodium phosphate, salt, potassium chloride, choline chloride, minerals (zinc amino acid complex, iron amino acid complex, manganese amino acid complex, copper amino acid complex, potassium iodate, cobalt glucoheptonate, sodium selenite), vitamins (vitamin E supplement, vitamin B12 supplement, d-calcium pantothenate, vitamin A supplement, niacin, vitamin D3 supplement, riboflavin supplement, folic acid, pyridoxine hydrochloride, biotin, thiamine mononitrate), guar gum, dried celery, flaxseed oil, agar-agar, flaxseed, locust bean gum, xanthan gum, cumin, Yucca schidigera extract

Fiber (estimated dry matter content) = 7.8%

Red items indicate controversial ingredients

Estimated Nutrient Content
MethodProteinFatCarbs
Guaranteed Analysis9%3%NA
Dry Matter Basis50%17%25%
Calorie Weighted Basis43%35%22%
Protein = 43% | Fat = 35% | Carbs = 22%

The first ingredient in this dog food is beef tripe. Tripe usually consists of the first three chambers of a cud-chewing animal’s stomach. As unappetizing as it may seem to us humans, tripe is favored by dogs and sometimes even includes the stomach’s contents, too.

The second ingredient is beef broth. Broths are nutritionally empty. But because they add moisture to a dog food they are a common finding in many canned products.

The third ingredient is beef. Beef is defined as “the clean flesh derived from slaughtered cattle” and includes skeletal muscle or the muscle tissues of the tongue, diaphragm, heart or esophagus.1

The fourth ingredient is chicken. Chicken is considered “the clean combination of flesh and skin… derived from the parts or whole carcasses of chicken”.1

Both beef and chicken are naturally rich in the ten essential amino acids required by a dog to sustain life.

The fifth ingredient includes carrots. Carrots are rich in beta-carotene, minerals and dietary fiber.

The sixth ingredient is dried egg product, a dehydrated form of shell-free eggs. Quality can vary significantly. Lower grade egg product can even come from commercial hatcheries — from eggs that have failed to hatch.

In any case, eggs are easy to digest and have an exceptionally high biological value.

The seventh ingredient is beef liver. This is an organ meat sourced from a named animal and thus considered a beneficial component.

The eighth ingredient includes green beans, a healthy vegetable notable for its vitamin, mineral and natural fiber content.

The ninth ingredient is 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.

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, we find 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.

Next, this food includes dried peas. Dried peas are a good source of carbohydrates. Plus they’re naturally rich in dietary fiber.

However, dried peas contain about 27% protein, a factor that must be considered when judging the meat content of this dog food.

In addition, we note the inclusion of 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.

Next, flaxseed is 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.

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 Natural Ultramix Indulgent Mix
Canned Dog Food
The Bottom Line

Judging by its ingredients alone, Castor and Pollux Natural Ultramix Indulgent Mix looks like an above-average canned 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 50%, a fat level of 17% and estimated carbohydrates of about 25%.

As a group, the brand features an average protein content of 46% and a mean fat level of 21%. Together, these figures suggest a carbohydrate content of 25% for the overall product line.

And a fat-to-protein ratio of about 45%.

Above-average protein. Below-average fat. And below-average carbs when compared to a typical canned dog food.

Even when you consider the protein-boosting effect of the pea products and flaxseed, this looks like the profile of a wet product containing a significant amount of meat.

Bottom line?

Castor and Pollux Natural Ultramix Indulgent Mix is a meat-based canned dog food using a significant amount of named meats as its main sources of animal protein, thus earning the brand 5 stars.

Enthusiastically 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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A Final Word

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Each review is offered in good faith and has been designed to help you make a more informed decision when buying dog food.

However, due to the biological uniqueness of every animal, none of our ratings are intended to suggest feeding a particular product will result in a specific dietary response or health benefit for your pet.

For a better understanding of how we analyze each product, please read our article, "The Problem with Dog Food Reviews".

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Notes and Updates

05/05/2016 Last Update

  1. Association of American Feed Control Officials
  2. Association of American Feed Control Officials
  • Amanda David

    I curious about the the rating on Castor and Pollux Natural Ultramix Indulgent Mix DRY

  • Steve

    Here is an image with the Lot No. if anyone else bought this. Best By date is about a Year and 1/2 from now.

  • Steve

    Just bought a few cans of the Beef Tripe variety 1/2 price yesterday at PetSmart. Fed 1/2 can and reduced kibble at 6 pm last nite. By 9:30 he started puking. Puked 4 times, yuk what a mess. What makes me really shake my head, a few months ago I bought a can of Real Pumpkin just in case he got an upset stomach. I didn’t realize it until I fed him this morning, but it too is made by C&P. Castor & Pollux is now on my Do Not Feed List.

  • luvmydawgs

    Castor and Pollux was bought out by Merrick a few years ago.