Castor and Pollux Natural Ultramix with Raw Bites (Dry)

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Rating: ★★★★★

Castor and Pollux Natural Ultramix with Raw Bites Dog Food receives the Advisor’s top rating of 5 stars.

The Castor and Pollux Natural Ultramix with Raw Bites product line includes one grain-free dry dog food, a recipe claimed to meet AAFCO nutrient guidelines for adult maintenance.

Natural Ultramix Grain Free Red Meat Recipe with Raw Bites

Dry Dog Food

Estimated Dry Matter Nutrient Content

Protein = 42% | Fat = 19% | Carbs = 31%

Ingredients: Beef, pork meal, lamb meal, sweet potatoes, dried potatoes, dried peas, natural flavor, pork fat (preserved with mixed tocopherols), pea protein, salmon meal, potato protein, lamb, beef liver, apples, blueberries, dried organic alfalfa meal, salmon oil, salt, minerals (zinc amino acid complex, zinc sulfate, iron amino acid complex, manganese amino acid complex, copper amino acid complex, potassium iodide, cobalt amino acid complex, sodium selenite), vitamins (vitamin E supplement, vitamin A supplement, vitamin B12 supplement, d-calcium pantothenate, vitamin D3 supplement, niacin, riboflavin supplement, biotin, pyridoxine hydrochloride, folic acid, thiamine mononitrate), choline chloride, Yucca schidigera extract, dried Lactobacillus plantarum fermentation product, dried Lactobacillus casei fermentation product, dried Enterococcus faecium fermentation product, dried Lactobacillus acidophilus fermentation product, rosemary extract

Fiber (estimated dry matter content) = 3.9%

Red items indicate controversial ingredients

Estimated Nutrient Content
MethodProteinFatCarbs
Guaranteed Analysis38%17%NA
Dry Matter Basis42%19%31%
Calorie Weighted Basis36%39%26%
Protein = 36% | Fat = 39% | Carbs = 26%

The first ingredient in this dog food is beef. Although it’s a quality item, raw beef contains about 80% 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 pork meal. Pork meal is considered a meat concentrate and contains nearly 300% more protein than fresh pork. Yet it can also be high in ash — about 25-30%.

However, the ash content of the final product is typically adjusted in the recipe to allow its mineral profile to meet AAFCO guidelines.

The third ingredient is lamb meal, another protein-rich meat concentrate.

The fourth ingredient includes sweet potatoes. 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 fifth ingredient is dried potato, a dehydrated item usually made from the by-products of potato processing. In most cases, dried potato can contain about 10% dry matter protein which can have a slight affect on our estimate of the total meat content of this recipe.

The sixth ingredient 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.

After the natural flavor, we find pork fat, a product from rendering pig meat.

Commonly known as lard, pork fat can add significant flavor to any dog food. And it can be high in linoleic acid, an omega-6 fatty acid essential for life.

Although it may not sound very appetizing, pork fat (in moderate amounts) is actually an acceptable pet food ingredient.

The ninth ingredient is 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.

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 note the use of potato protein, the dry residue remaining after removing the starchy part of a potato.

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 actual meat content of this dog food.

Next, we find 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, salmon oil is naturally rich in the prized EPA and DHA type of omega-3 fatty acids. These two high quality fats boast the highest bio-availability to dogs and humans.

Depending on its level of freshness and purity, salmon oil should be considered a commendable addition.

Next, we note the inclusion of dried fermentation products in this recipe. Fermentation products are typically added to provide enzymes to aid the animal with digestion.

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 with Raw Bites Dog Food
The Bottom Line

Judging by its ingredients alone, Castor and Pollux Natural Ultramix with Raw Bites looks like an above-average dry product.

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 42%, a fat level of 19% and estimated carbohydrates of about 31%.

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

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

Even when you consider the protein-boosting effect of the pea products, potato protein and alfalfa meal, this looks like the profile of a dry dog food containing a significant amount of meat.

Bottom line?

Castor and Pollux Natural Ultramix with Raw Bites is a meat-based dry 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.

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Notes and Updates

12/04/2016 Last Update

  • Equis

    if this is the one with red meat recipe, my dog loves it, like he actively asks for it…and eats it like he is desperate…he doesnt do that with any other food. However, I have noticed that the other recipes like chicken and lamb appear to give tummy issues. Has anyone noticed this in their dogs? might be a breed thing, but still.

  • Lilly

    5 star, thank goodness, my dogs love it.